Malicious PDF — malware analysis report

Static analysis result for SHA-256 67153ca56a240eb9…

MALICIOUS

PDF

88.8 KB Created: 2021-09-03 04:32:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b8ed55224416db9ca4df5567825a0b6d SHA-1: ff5f6e7692bf209b1f9e405c89d5b95dd1fa2815 SHA-256: 67153ca56a240eb9b20a8e13ed70530573660a546a1a32f6ce25c259112fc05b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised CMS upload directories, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • 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.
  • 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://travellightnepal.com/userfiles/file/tibikiwewokotamopiluxisav.pdf In PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/aa63aa2eaec041b9545e444196604da4/komawovusubi.pdfIn PDF document text
    • http://www.premiumimport.nl/ckfinder/userfiles/files/80091666373.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be83418b6bb---60511777144.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/b64a2537327c825d06ac979461ce3e20/16436431575.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/99738730612.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/b06r51c1ivpbf2bakafvb4af8k/gifoxugidusekerageban.pdfIn PDF document text
    • http://fgosvo.ru/files/files/877093663.pdfIn PDF document text
    • https://parfumzone.ro/files/file/zituxevokomadeg.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160834f14c6dbb---94115345624.pdfIn PDF document text
    • https://gullyracing.it/admin/ckfinder/userfiles/files/23825658968.pdfIn PDF document text
    • http://op-gold.com/ck_image//files/giterixaxumerunuzobufula.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/1795326054.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/dc3c4092f2f64e479f1f9a18146fcfe8/kowuragutelototipewuz.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b9cd54f74---79467419074.pdfIn PDF document text
    • http://hotelbasantresidency.com/uploads/lojilufezoxowolikisovek.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/tizokibadezibutafise.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/fc843798a6ef36a3bd03f9b722fc959f/zanisanarekibiwam.pdfIn PDF document text
    • http://noithatnhapkhaugiasi.com/luutru/files/jutojokijomexolivag.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/98022628888.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/f3a8863cf54b15f9b6c6df5847538b9e/fuwovunufuxugowexokejobe.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/7080518055.pdfIn PDF document text
    • https://ginniglobal.com/uploads/file/fonoxuro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=des+algorithm+in+cryptography+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF488 18224 bytes
SHA-256: 9099cca371ca5159616d8179759a24ece9626ff1f99e574b8b18f4e6fdf25ac8
font_01_sfnt_off00012414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12414 11184 bytes
SHA-256: 7ce833c921ba0f2cce33653a1d8dfacc3fb0bac054196f2e9063e338ac7bbe77
font_02_sfnt_off00013de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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