Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ba0eb7ba058d60…

MALICIOUS

PDF

75.9 KB Created: 2021-07-04 04:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 232fbd5752867307964b13a5d8ad9520 SHA-1: 3fa22de8ffd235fd184c1b7e9178c1a9e838fa6c SHA-256: 02ba0eb7ba058d601e37166cc4611bfb5305acb2b87f2c164c8278d34e34b6a2
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pistant.ru/uplcv?utm_term=brown+and+brown+wrecker+service PDF link annotation
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/302cba7f0a7e8f90803fd915cd08c9de/tejedotaj.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/66920840510.pdfIn PDF document text
    • http://www.addvanceo.info/userfiles/files/tiwanisozijusura.pdfIn PDF document text
    • http://infinijewelry.com/userfiles/file/30602885442.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/nt98epk2v4pesn6d6sfnqnsk71/fujixijidinume.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/93463697755.pdfIn PDF document text
    • https://matskaren.se/anvandarbilder/203/files/lorirovarusewujamaroturaw.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608508ed2c1e8---femobakafotowibu.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c418361595b---niledomevem.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210604123841548.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/gelukamilovixinupizujoga.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607202b8904d6---28119462741.pdfIn PDF document text
    • https://samowar.ch/upload/file/kenazabejenokivazamu.pdfIn PDF document text
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/92577535798.pdfIn PDF document text
    • http://ddgasul.com/userfiles/file/sedimumawajufe.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/37507126076.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/gopixivovirulugu.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/14873783395.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/7832f270d1b877c52ea773f8a1102a7a/wonamaruzuvox.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/e5606831cc8bbf1aee543b24ef6dc897/sowibedoladepupuboxojufax.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/12c5159ce74a260cabe66d28d4c027c6/xosisuduvevagumedizub.pdfIn PDF document text
    • http://alexsrmenchion.com/clients/b/bf/bf5401b25fe3457642f5a6f1150d5537/File/wudunefinuvuwojadawu.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/55d1922de390e36bfacd3e0c4422596b/68967060881.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed6bab17bd---91705889643.pdfPDF link annotation
    • http://logistra.fr/ressource/site-image/files/84881661151.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b2257dee4cd---2980600277.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/19824550097.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E6 10656 bytes
SHA-256: 3faebd2f44dd49c51639d0aa357eb1af94f787b751869da9e1b9237138254ce5
font_01_sfnt_off0000de80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE80 16744 bytes
SHA-256: 37cb2e3971eb6c5b84c483d3da08f6168a504bf381d6c6d53095bf2ec4320109
font_02_sfnt_off000109ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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