Malicious PDF — malware analysis report

Static analysis result for SHA-256 b07fe34db21dff3e…

MALICIOUS

PDF

87.6 KB Created: 2021-07-21 13:24:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1dd93b0fd3c427ba23374e806df9c964 SHA-1: c0a4391917135c08d64e2fe64647258cd9aba2e1 SHA-256: b07fe34db21dff3ea0df12dfaa092167e66e91c66d8bf54808818f2e1a2c743e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. Heuristics identified it as a link farm and a callback phishing lure, suggesting the user is prompted to call a number for a fake issue. While no scripts were extracted, the document's structure and embedded URLs point towards a phishing attempt, likely to trick users into revealing sensitive information or falling for a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://bem-sa.com/img/file/fodoxepu.pdf In PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b1590f8972f---lomagofoxuzoz.pdfIn PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/44067456485.pdfIn PDF document text
    • https://bnovum.hu/downloads/58132918038.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/92604523912.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160768b5cc840c---53054988995.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/8d36fedbd4207b9eebe5eb2028fedf88/ragoziwemazeraxab.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/53766390068.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/rejedaj.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16086e44e05418---lapuvisilewomegeku.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/96088908954.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/39870531576.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/7039d9a17808a8f3829cdff746ca72ea/megixedavesotute.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/16lbjt9vas0ifk4c1vgvbrkose/9512422751.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7e8927004---xabexolawot.pdfIn PDF document text
    • https://zhbiotech.com/CKEdit/upload/files/55606263815.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/ed8dc300fd9eebfe9e6b913af1a3f54c/16619140043.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/pp9bgcofish68p8qb7cir9hbu5/79137122589.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad906c93a02---sisezadige.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/14254859993.pdfIn PDF document text
    • http://stattus.com/assets/file/21164866942.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/6alsbmr37lb4li6fj7qkptm3e7/79417699774.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/dovudo.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/busipagogeruga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=bleeding+from+nose+in+summer+for+childPDF 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_off0000f38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA6 10816 bytes
SHA-256: 924b182aca7c5240ea1e441b63c409d1598ab221a1f62be501e06896c1d87c56
font_02_sfnt_off00012422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12422 17216 bytes
SHA-256: 99a8cb519c65822542cbb45c6cf0b07797a82e0a7972ab4742e44f8263804f3f

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