Malicious PDF — malware analysis report

Static analysis result for SHA-256 662387ab9b573c7c…

MALICIOUS

PDF

83.1 KB Created: 2021-09-05 16:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6e41e50c5f07e5524d8cb07418db92b8 SHA-1: 418b4e1a50736e395ec4b200c36ba7187982aafd SHA-256: 662387ab9b573c7c7463471fac4b000ad2cc6129d1a09c5cdc41e565e86d1b6e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF format can embed JavaScript, which could be used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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 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://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/tb49eldehtvq1h0pvmq0792oue/92499507102.pdf In PDF document text
    • https://ipic.vn/userfiles/file/1997159954.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/lemisogimiganixiwibebex.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/jazoni.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/41707080896.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/58996603222.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16070acecd397e---refelux.pdfIn PDF document text
    • http://vecsecity.info/editor_up/nikebilapajep.pdfIn PDF document text
    • https://newsru.md/upload/userfiles/files/96061841767.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/da57ce96b62e7a3ebd1aaa5c48de07f4/moxademuxorifenanozaruro.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/29129857780.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc7c2b0d52---timuloguwabozu.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/989091907.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/45778010163.pdfIn PDF document text
    • http://petgears.com/app/webroot/files/file/sejepum.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16076111d83a76---vikobukipusijekapogozeli.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/nasumudaredapo.pdfIn PDF document text
    • http://suankaew.net/upload/userfile/files/34949322151.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/zawolememozugewaxotutatir.pdfIn PDF document text
    • http://esenkardeslerinsaat.com/resimlerfiles/25411879333.pdfIn PDF document text
    • https://designclarf.it/file/tegefanonetukanolixelo.pdfIn PDF document text
    • http://asja.ua/userfiles/file/97101601382.pdfIn PDF document text
    • http://robbes.nl/media/files/nukifiwanufajazuwigijogeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=ogata+control+theory+pdfPDF link annotation
    • 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_off0000de96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE96 10776 bytes
SHA-256: 9b57efbfb6793f73e87e22456a999bd7b5ea50ceb84006e79fb9d8e7558c644c
font_01_sfnt_off0000f72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F41 18280 bytes
SHA-256: 6be64ca183b16c9cf3c356788d98cf200c6b6827437a033bbbba2b2539605165

Open this report in the interactive analyzer, or submit your own file for analysis.