Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa7aa4f056f18bd5…

MALICIOUS

PDF

84.3 KB Created: 2021-09-01 06:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a1312cd439921ccfa23123f920df3457 SHA-1: d3eef4c3155d8fd8f46f768d1f745a910823a8e7 SHA-256: fa7aa4f056f18bd586096e244ead9bed84a76e06024b4e4ebec98bb6c3f72627
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. It contains numerous links to external websites, many of which appear to be part of a link farm or hosted on compromised CMS platforms, suggesting an attempt to distribute malicious content or phish users. The presence of a 'download button' lure and callback phishing elements further supports a malicious intent to trick users into downloading further payloads or engaging with fraudulent services.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://infrive.ru/uplcv?utm_term=dubbed+movies+in+tamil+free+download PDF link annotation
    • http://art-lan.ru/uploads/assets/file/vinoparipedugule.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/zikumadujir.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/kovewalemami.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaeeb645099---13415420182.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/49054149034.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b91018d346e---nazuxaj.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081187e298a9---78158840.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/0nv8as6h69ac2abv5oe8k6nt96/visitenovil.pdfIn PDF document text
    • http://orderkai.com/uploads/files/vididodosizixusera.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608856fb6fc84---407778251.pdfIn PDF document text
    • http://aquatrustfina.com/userfiles/file/vapogaputariwifigimi.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/0474f43f7dcdaa99a12cc96e021f0528/58849795409.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/86555807021.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/rafadaguxix.pdfIn PDF document text
    • http://springbook.no/files/27391964630.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/23cf3db38d19bdd36e61e10d401f9d80/kofezeruguxonuxefodazo.pdfIn PDF document text
    • http://xn----ctbguteehkho5h.xn--p1ai/ckfinder/userfiles/files/94478832067.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/cd36a9eafe17a748d9d5e6207331f3b1/53171945985.pdfIn PDF document text
    • https://imihwa.com/uploads/image/20210828/files/20210828011840.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/zewosaf.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2af9681d4---79081219893.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/bc18cub48oa1ijrdg1s8pmja1b/mitizuvufa.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_off0000e4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A4 10908 bytes
SHA-256: c8c21ae82473ca92f0f9f0b1a14807f4630958bbefa072146c6f24d1bba0ea33
font_01_sfnt_off0000fde7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE7 17692 bytes
SHA-256: 7b5d489089c9062d3a334fbc1c32fbfc25f71f5b214456c603bd54ed2854c32c
font_02_sfnt_off00012b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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