Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b64a503e4fe5fb2…

MALICIOUS

PDF

76.5 KB Created: 2021-04-24 19:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 65e90aaf3e85fcdb48cb995e107d0e23 SHA-1: 748fe739387fb108a57a19d705a38e28ae21fc91 SHA-256: 2b64a503e4fe5fb212c24dc7d99a7a252698d1e150242880105086aa84043efb
186 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, characteristic of an SEO link farm designed to redirect users to malicious content. The embedded URLs suggest an attempt to direct users to potentially harmful sites, likely for phishing or malware distribution.

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 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.
  • 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://resalured.ru/strik?utm_term=how+to+steam+carrots+in+aroma+rice+cooker PDF link annotation
    • https://fatitabo.weebly.com/uploads/1/3/4/7/134757356/0d0c7f895e.pdfIn PDF document text
    • https://milobixokat.weebly.com/uploads/1/3/2/8/132815045/romuzoxopojowosowedi.pdfIn PDF document text
    • https://xomijati.weebly.com/uploads/1/3/5/3/135329577/9892363.pdfIn PDF document text
    • https://neverudinirol.weebly.com/uploads/1/3/4/5/134585264/7aa914fc.pdfIn PDF document text
    • https://zuxijonimobazi.weebly.com/uploads/1/3/5/3/135351106/wafujutodeli.pdfIn PDF document text
    • https://kolijegidixut.weebly.com/uploads/1/3/1/3/131379325/fezulaguz.pdfIn PDF document text
    • http://aydym.club/nixewujaseforiopp9o.pdfIn PDF document text
    • https://nadagedo.weebly.com/uploads/1/3/1/8/131858166/632251.pdfIn PDF document text
    • https://togazozaxezux.weebly.com/uploads/1/3/1/6/131606461/walun.pdfIn PDF document text
    • http://azakalaza3.xyz/how_much_does_it_cost_to_fix_tv_screenpyr1b.pdfIn PDF document text
    • https://pijaxulejogelub.weebly.com/uploads/1/3/0/8/130874219/fifesalizu-jofaxanevid-wimodabezukiwo.pdfIn PDF document text
    • https://rotugufe.weebly.com/uploads/1/3/5/3/135315725/2678243.pdfIn PDF document text
    • https://tizevilujiv.weebly.com/uploads/1/3/1/4/131406709/wipavozitamegegirima.pdfIn PDF document text
    • http://copyright-security-ig.com/atlas_map_of_world_freemw1oz.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/temujonuwu/16048676354.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/ordering_numbers_worksheets_for_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/96898886475.pdfIn PDF document text
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_e5027bd6287546b9b77bcc03b010e522.pdf?index=trueIn PDF document text
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_cd77eff84eb7415aa361e220507e6062.pdf?index=trueIn 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_off0000ee28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE28 5028 bytes
SHA-256: 27c7600ceb8cdea66f4ae9a91b1ad15c7a69b19a00a68c5ad870c1fe87cbe12e
font_01_sfnt_off0000ff3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3A 10852 bytes
SHA-256: 13f10e8a16a018a2f901137d25ba591bcecec92f2970d3e7d1ce98aa8936166b

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