Malicious PDF — malware analysis report

Static analysis result for SHA-256 be87869cc2378024…

MALICIOUS

PDF

87.6 KB Created: 2021-09-06 04:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 91b39dd38a04e74bd7be308710750914 SHA-1: 59a9cf479cad182ec1f75a6949c8fc475cb18845 SHA-256: be87869cc2378024a2564bdaa3b74f0229873e4263733de90951ed00d16dd1f0
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a callback phishing or tech-support scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It contains numerous links to potentially compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious content or redirect users. While no scripts were extracted, the presence of embedded URLs and the lure pattern strongly suggest an intent to deceive the user into initiating a phone call for fraudulent purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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 http://fullx.net/files/retuxijowuzuripuzuj.pdf In PDF document text
    • http://heorungminhphat.com/luutru/files/kawaruxisewivoja.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/99790825203.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c83700c36---jusezisilijujivobaxaga.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/dofidejitodilexovejum.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/01e3a62949d66b84466ed7c7ff1c577e/94234462618.pdfIn PDF document text
    • https://fisheaglesafaris.net/pics/user/file/wumutajikomer.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd41264cf9a---64006769858.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/f19be3aa8eae06828ca9870000a6d4d1/78368582382.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/zawokavakuwifenegewop.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16118bb6b8ab8f---21936958054.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/3963406662.pdfIn PDF document text
    • https://southwestlooms.com/admin/userfiles/files/25674944553.pdfIn PDF document text
    • https://bliznacite.com/files/tidudiku.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/56662667970.pdfIn PDF document text
    • https://shatalarab-llc.net/userfiles/files/vekifexowerimipajoburav.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/vomavetisemobubesezad.pdfIn PDF document text
    • http://psn-monolit.ru/img_file/files/valenefopimovimat.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e93d714fa03---57174287712.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/wenamidenanuwarota.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de4a1d9b54---26087189705.pdfIn PDF document text
    • https://bio86.net/fichiers/18012692466.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=goldman+fristoe+test+of+articulation+manualPDF 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_off0000ed92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED92 19116 bytes
SHA-256: 464a7b667489f9b880d140cbac007d7a850e1254b0d5081ec451985ea9580cab
font_01_sfnt_off00011f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000137a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A5 10776 bytes
SHA-256: c6710f50073a06d9f700c2cd46e7bc15ba060dcc5fbae4777ecd40c542037942

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