Malicious PDF — malware analysis report

Static analysis result for SHA-256 6750a0d2e5de7beb…

MALICIOUS

PDF

79.3 KB Created: 2021-09-18 19:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5f698821ba82f711da829c2d87a20abe SHA-1: 30405e39aa34b7985411ab3441110d1251d22023 SHA-256: 6750a0d2e5de7bebf4ba2ed3512c1b5134d639016ec16d18de52bf7fc5d8a542
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a callback phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content or initiate a fraudulent interaction. The presence of numerous links, many pointing to potentially disposable domains, further supports a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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://speakingaboutnetworking.com/ckfinder/userfiles/files/lijudowudagopavejojate.pdf
    • http://linuxnewyork.com/draft/media/dakawuwufaf.pdf
    • https://silverlabpupsforsale.com/userfiles/files/36173417610.pdf
    • http://bongoes62.dk/userfiles/file/14287319700.pdf
    • http://savitaco.com/uploads/images/files/11751780003.pdf
    • https://4wheelchile.cl/admin/uploads/file/16527474573.pdf
    • http://turinhotelcompany.com/userfiles/files/gugagaluporivu.pdf
    • http://fernandopelosini.it/userfiles/files/galubo.pdf
    • https://implantsdentairesdesmoulins.com/upload/editor/file/45881654044.pdf
    • http://kimkhimientrung.com/uploads/image/files/dukuvipiximatexageperez.pdf
    • https://cheeselicious.net/UserFiles/file/vozuniwibijafuzi.pdf
    • https://vivaldiroberto.com/img/files/mediafiles/file/76670347695.pdf
    • https://rent-1.es/ckfinder/userfiles/files/2930251742.pdf
    • https://secolink.sk/userfiles/file/sevexivukomaxati.pdf
    • http://envigest.cz/upload/file/wamoradejupapanasesa.pdf
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/70934656703.pdf
    • http://dydlhx.com/upfiles/file///87054945234.pdf
    • http://schokoladenfontaene.de/idata/nopajuditiregelosur.pdf
    • http://speckrepej.com/upload/file/26536819132.pdf
    • https://etevent.itweald.com/uploads/files/613dd502ec711.pdf
    • http://kpghomerepairs.com/uploads/image/files/duwusukugefojuvomibu.pdf
    • https://fokusmedia.com/images/uploads/98089168440.pdf
    • http://spad.kr/userData/ebizro_board/file/26980210982.pdf
    • http://topimmigrationlawyer.org/ckfinder/userfiles/files/zudipa.pdf
    • http://odessawa.com/userfiles/file/tadofujefopudi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=ultimate+golf+mod+apk
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0da.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DA 16792 bytes
font_01_sfnt_off0000e8f1.bin
185e55d1251fbabdee5ab3df0cb6d7495ea2ef5c776bd48cf32f518279a2b213		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F1 10568 bytes
font_02_sfnt_off000100d0.bin
537f354f48a3c8b3077f62283c8c843256a42e7ba7fb3791a7f06d60a10202c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100D0 18272 bytes

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