Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ede58c54aff147…

MALICIOUS

PDF

81.4 KB Created: 2021-07-02 21:33:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 187bb5d1db954b18375e52bde94c773a SHA-1: eecf0e0d72b6e513ceb33baafc3cd8e54c40728b SHA-256: 72ede58c54aff1477e4e3e5dcef6f8967a282f817eabfdadd7192ca25107aad8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised WordPress sites, suggesting it is part of a phishing campaign. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to prompt the user to make a phone call, a common tactic in tech-support scams or callback phishing schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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) or Microsoft license-boilerplate 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://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/fabg6jn58c4cfkqnbsr0jgkdiq/38519615.pdf In PDF document text
    • http://amirafouad.com/uploaded_files/file/72375498077.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/bq0ls3oosucbcnso0ktde683q2/simijonukesi.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cabd634d1ce---87653240597.pdfIn PDF document text
    • http://praxis-greve-polley.de/web/editor/files/63990081304.pdfIn PDF document text
    • https://chungcungoaigiao.net/uploads/files/jawetizevivojoxixad.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/94765071279.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/0a727d0bc5185777086d401194884882/18532156041.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/0668eaddb0c1afb593684510326feb35/90706641399.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebab1e98f4---vafovufanodede.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/706e185128a0a49528f1c801ec8356bb/55969400505.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/3bf4f3679e524e4615f526d3776a2cec/68386930735.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/2ffe8b014fe836929cae994ee26e3125/50742759130.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/tasiwaromitiregiwiwiso.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/pupigibodepuxetobe.pdfIn PDF document text
    • http://jfk1969nola.com/clients/873000/File/39259664071.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160888ea25c298---20694327304.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607486b3d27a4---2076752653.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/8a6f5bb5e715d6a270cd28dd824d8279/5638371142.pdfIn PDF document text
    • http://dzbnf.com/upload/file///69082892627.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609400d5c070a---siwoje.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/dujuvinolekamukibobiju.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083dd863d862---vepazeguzadi.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/9578012665.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/5tjqfekgeeualghn6bkpb0n2qi/javenapudulizinutoro.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607841002a621---mifejomeduwakadefejegi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=jefferson+county+planning+and+zoningPDF 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_off0000d8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F5 17208 bytes
SHA-256: fbb43f010dbadb909f622f4c2cccc9e8e5d5bc1b6f20eca96eed4efcf69e37b8
font_02_sfnt_off00011e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E37 11060 bytes
SHA-256: 7b5a1639b1d475c4b276722fbaff73c43bf7076462a9318fd2d1e4459b0ecd70

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