Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6ca854294776e1…

MALICIOUS

PDF

74.5 KB Created: 2021-03-26 09:56:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c8bd9ac586beddacd4b14416be3c5659 SHA-1: 5b841e24f32f9d5ea2dfb0746384407675f0865e SHA-256: 2b6ca854294776e18d6d2cb4424d248c8a7550ff9edfdbaa04a20e65429850ea
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://fokemale.ru/strik?utm_term=how+much+does+it+cost+to+print+a+poster+at+fedex PDF link annotation
    • https://cdn.sqhk.co/nuvexajamu/kdzxUia/dark_forest_mansion_minecraft.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/gdibHib/overcoming_obstacles_inspirational_quotes.pdfIn PDF document text
    • http://dosubodanes.mypressonline.com/aparejo_potencial.pdfIn PDF document text
    • http://jurojegame.getenjoyment.net/intermatic_st01c_programming_instructions.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501356/normal_5fe4cd5d543f4.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/cbigOhb/xatarataj.pdfIn PDF document text
    • https://cdn.sqhk.co/risejesob/XjiV8jc/heart_symbol_mobile_legends.pdfIn PDF document text
    • https://cdn.sqhk.co/jufebarur/4CihMHv/zogomugivexomeviza.pdfIn PDF document text
    • https://cdn.sqhk.co/kozosorole/ifq3Mwn/xazavu.pdfIn PDF document text
    • http://dobilarujokux.sportsontheweb.net/41475630700.pdfIn PDF document text
    • https://cdn.sqhk.co/penunotati/arSpiiN/kedemubebexazoramoru.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/hiie0je/vuwilu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401559/normal_5ffcd9a254115.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472775/normal_6002980a43bdd.pdfIn PDF document text
    • https://cdn.sqhk.co/derixosu/cheGi5l/zombie_frontier_3_gift_code_android_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/pupumukisev/YPIChco/dig_deep_sports_quotes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wenulusevikofa.myartsonline.com/behavioral_couples_therapy_for_alcoholism_and_drug_abuse.pdfIn PDF document text
    • http://duxepivol.myartsonline.com/cours_sur_le_rapprochement_bancaire.pdfIn PDF document text
    • http://mibobugaf.rf.gd/what_does_self_isolation_before_surgery_mean.pdfIn PDF document text
    • http://tutunod.epizy.com/tuxin.pdfIn PDF document text
    • http://nujuxat.epizy.com/new_bollywood_movie_free_hd.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DA 5484 bytes
SHA-256: 6f54308eff59c9822d52f09788a15d4fa19553ac7348090b1709c52ce5dd4cb2
font_01_sfnt_off0000f76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76B 10648 bytes
SHA-256: 46e161c24ad469eb96e0215e0d8b2874c3311ebc0f25cc5a932ed78da8be84fc

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