Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce3a02285b7970c…

MALICIOUS

PDF

70.5 KB Created: 2021-06-21 09:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a4fafe09857be798e7f0065072f00df SHA-1: c3ec0dbb4cb98ad3ba03cb9a6355a9adce9dec83 SHA-256: 4ce3a02285b7970c8b0b04be963ceec5e9ff318daee8b68b90350a721a041bfa
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to compromised CMS uploads and disposable hosting, indicative of a phishing or malware distribution lure. The presence of a callback phishing lure heuristic further supports this, suggesting the document is designed to trick users into engaging with malicious actors. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/0nnjoq5j07o2v2sek3kipqd8iq/gegebezome.pdf
    • https://deesudcoolingtower.com/userfiles/file/pogexugiwosa.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160843733e350f---junujofeku.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2816f49fd1---30981557086.pdf
    • http://shinex-auto.com/userfiles/file/titugujiruzizijubedunir.pdf
    • http://stellamaris.cz/userfiles/64342214376.pdf
    • http://vhshf.de/File/35494225292.pdf
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/tkgnpc0ssb87env2no7nenvfbb/58623384838.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/3a1jeku2g2ar85c0hmdn9s0qfi/teweludel.pdf
    • http://tuzvedo.hu/elemek/file/52334714323.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bee238e69c4---91669818519.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/def7f764fc0f26b90b9efff459b54014/4868255813.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1609de9c1a9916---44548113835.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/apanbg43vla9d4ugtrttgr179h/rulizevir.pdf
    • https://guclupin.com/calisma2/files/uploads/tewifadujis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=five+nights+at+freddy%2527s+security+breach+apk+android
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce6a.bin
dee9d2e688b5af3427b22089ccc83eb1c599e5fa44a680aed87efef5817680cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6A 5740 bytes
font_01_sfnt_off0000e20e.bin
55b85673ee4ec6d7702da77ca53a45581fa08574578dedfc4897526f6bb5af75		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE20E 12500 bytes

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