Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2af3a6fa2ddb5c…

MALICIOUS

PDF

81.1 KB Created: 2020-11-18 06:59:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 58722883bcc6c531fa15e77af5504a8e SHA-1: 223889cc1dc722e7ac2fceec2e7296253a349af6 SHA-256: 6d2af3a6fa2ddb5c70651bec4c666f7e8484d8dffc37adc0d5e9ebdbe67a41d1
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/strik?utm_term=main+hoon+na+full+movie+watch+online+free+dailymotion In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387235/normal_5f94a663a9928.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428331/normal_5f9bd87328724.pdfIn PDF document text
    • https://xataramev.weebly.com/uploads/1/3/4/3/134320843/bedijenutowulixa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f92536528e2a.pdfIn PDF document text
    • https://muneberixiloza.weebly.com/uploads/1/3/4/3/134339704/ritetatozukodako.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382960/normal_5fa7950e85550.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pidufozu/transmission_fluid_capacity_2005_f150.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58f01686-cd5b-4b2b-9a90-854312427fbe/dil_mein_ho_tum_cheat_india_mp3_down.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/wow_classic_druid_healing_spells.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/iowa_high_school_football_records.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd2c66cd-d7ac-42de-906f-aee945741843/acls_provider_manual_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/tennis_elbow_physical_therapy_protocol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11a58046-5bdc-4fbe-a84b-7aeb615bd7a0/18027934692.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_off000100c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C4 5340 bytes
SHA-256: a8a9fa8b6a086aee0e3d1d7c65303bf03ff2d1b767e5b77183c7e53163e58459
font_01_sfnt_off000112ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EF 10724 bytes
SHA-256: c444f8186480a9762d145a8a58b34a983c497717dca9376bf1b491595ab37a04

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