Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec6ae51a0e4476d…

MALICIOUS

PDF

83.5 KB Created: 2021-02-21 12:45:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f0bcdb79fc002d398c890d5089c4c0e3 SHA-1: 400566d0c1d8c53fc577108a361b27a97ff747a3 SHA-256: cec6ae51a0e4476df19cd49af2080895a0f00d4e47e33cbe61b3732d7bbeae32
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document body, though heavily obfuscated, contains a URL that is likely part of a lure to redirect users to a malicious site. The presence of numerous disposable domains and link farms further supports a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://seumenha.ru/strik?utm_term=how+much+does+a+90+hp+johnson+outboard+weight PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499972/normal_601207f4ee6e4.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/hot_wheels_unlimited_triple_loopi631v.pdfIn PDF document text
    • http://rostov-mobile-doctor.ru/alienware_area_51mmnrak.pdfIn PDF document text
    • http://itasummer.fun/hannah_montana_mp3_downloadcncje.pdfIn PDF document text
    • http://datingsexchat.site/twilight_full_movie_subtitle_indonesia831as.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486037/normal_60093dad8f96c.pdfIn PDF document text
    • http://connexion-amelii.xyz/juzenemusoberukezeba8bu5e.pdfIn PDF document text
    • http://bilkaita.space/makulimupamibezitezvbwxz.pdfIn PDF document text
    • http://bhd-management.space/rosisarezoxefofavovuzehjkn.pdfIn PDF document text
    • http://rawenspant.online/super_fowlst_secret_charactersgb0ou.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426822/normal_5ff763dbec3a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480403/normal_5fdad489794ca.pdfIn PDF document text
    • http://mini-cam-v2.club/bahamut_lagoon_english_snesrm1w3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373526/normal_6021510ff0582.pdfIn PDF document text
    • http://lngcliente.com/frontline_magazine_august_20205t50v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385612/normal_5fc68302cb620.pdfIn PDF document text
    • http://uscreditmonitoring.info/ite_checkpoint_exam_answers_20178ufg2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413119/normal_6018c2828d0dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484143/normal_601097776dbf7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449771/normal_6002fbf7abdf8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10218 6024 bytes
SHA-256: 2693a7cbf93fbba1d59ca0278f8d3de011b6b280ec4ed852be6f43a0083d15f1
font_01_sfnt_off0001166f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1166F 12580 bytes
SHA-256: d87261c8ba9e6e801533fe3e84f11eabfc75feb709a5613267ef93675da1ba89

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