Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86002c3742b7035…

MALICIOUS

PDF

78.6 KB Created: 2021-09-13 18:13:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9544407a3fa55b079f684a48a281c72e SHA-1: 887b94a9b7e7fac1a4abc17a80bb8a6255299fc7 SHA-256: f86002c3742b7035689a33ec2a6c321e84414e47594a7fe198031310abe5b094
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of external URIs and the overall structure point towards a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=wrong+turn+4+full+movie+english PDF link annotation
    • https://bank-kredit.at/ckfinder/userfiles/files/vurojanuxabanudev.pdfIn PDF document text
    • http://iccjsc.vn/images/uploads/files/jodafuduxewedav.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/6720584885.pdfIn PDF document text
    • http://contelex.it/userfiles/files/pebupaxomiralopebiwerobu.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e67d1e5b19---sejaj.pdfIn PDF document text
    • https://satellietgroep.nl/userfiles/files/48208313145.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/27254952288.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/625836cad34bcdff3d637a3bdda63e56/85067620621.pdfIn PDF document text
    • http://tingchucontrol.com/Uploadfiles/files/59963414120.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/45851403990.pdfIn PDF document text
    • https://padservhosting.com/userfiles/file/joxemexodonaxu.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16138e8a33c320---mamir.pdfIn PDF document text
    • http://rockhouseschool.com/rockhouse/uploads/files/zufenusisum.pdfIn PDF document text
    • https://ibextrail.com/editor-images/femotubegogajiz.pdfIn PDF document text
    • https://mayxaydunghoangphuc.com/userfiles/files/bobaralo.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137ac7c2279a---57025832731.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/vumugp9s5pj3g0kf369iddgna0/28138024523.pdfIn PDF document text
    • http://pecsimutargygaleria.hu/files/file/bipumegajonagog.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/leniguwexebovofa.pdfIn PDF document text
    • http://designerhouse.ru/upload/files/62016204098.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/a6b000ffe84b82a98eaaf4afdfc1d106/79780061023.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/8273032074.pdfIn PDF document text
    • https://officialbacknumber.com/editor_up/jedekis.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/zofidurubexukuvinabivab.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e890c977f5---nakugowovesaweritawo.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_off0000cc84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC84 10736 bytes
SHA-256: c18e8e78fcd4d1600e838ed3bdce3b65640843bebe578e01ed3aa1578cd79736
font_01_sfnt_off0000e516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE516 18560 bytes
SHA-256: 882995a670a3a3228a9651ef431a79ee475844289ae71347315c10a1e40587af
font_02_sfnt_off000114cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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