Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1fece542c7d1501…

MALICIOUS

PDF

72.9 KB Created: 2021-03-14 05:56:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 732e774a07172efb5fdf75485f64e99c SHA-1: 034d8ae4f940a1f706e8f635a8f19eec1a154a00 SHA-256: a1fece542c7d150136dd2f06740de469a851345c5773153e1fb861d87cbfe6b6
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded URLs, many pointing to disposable domains or link farms, suggesting a phishing or scam attempt. The presence of 'utm_term' parameters in some URLs indicates tracking, common in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://soxebez.ru/123?utm_term=boyd+and+vandenberghe+convex+optimization+pdf PDF link annotation
    • https://cdn.sqhk.co/piwoputi/hahjjdr/fewoxeb.pdfIn PDF document text
    • https://bonitolopulako.weebly.com/uploads/1/3/1/3/131384654/ab90fd4f29be2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386333/normal_6003a1a818e7c.pdfIn PDF document text
    • http://mosquito.codes/curso_de_ingles_para_principiantesd7dsd.pdfIn PDF document text
    • https://mamufitixiru.weebly.com/uploads/1/3/4/6/134640278/9671108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384035/normal_5fd1138ed9134.pdfIn PDF document text
    • https://cdn.sqhk.co/pujazojiwixi/hh9xUgc/tugifevo.pdfIn PDF document text
    • http://verification-help.business/27501146498c4a77.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/MgijbVQ/saviguxozovexagududul.pdfIn PDF document text
    • http://hookup668.site/78895046350uni4x.pdfIn PDF document text
    • http://sosefuxewaduta.iblogger.org/dusew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423454/normal_5fef648666428.pdfIn PDF document text
    • http://lnstagram-copyright-supports.com/chokher_bali_novel_in_bengalifz3a0.pdfIn PDF document text
    • https://cdn.sqhk.co/jekidase/UieGXji/velixixikavabigisa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409614/normal_5ff17f6ab3717.pdfIn PDF document text
    • http://drilltech.info/wukawufaxegiwus4yk1u.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/latidge/checklist_format_word_template.pdfIn PDF document text
    • https://zunijitulizi.weebly.com/uploads/1/3/5/3/135305500/vovapidedi.pdfIn PDF document text
    • http://kinorio5.xyz/31986112881solvl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lajuvinujako.rf.gd/h265_handbrake_guide.pdfIn PDF document text
    • http://retobawunabe.rf.gd/ragerilapofuzizu.pdfIn PDF document text
    • http://sipomivizipe.epizy.com/child_short_stories_in_urdu.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_off0000dd53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD53 5828 bytes
SHA-256: ae2a2c60b90a432ff9ccf506c1335dc433a6dd2442b51ce074baa1ddbd568bed
font_01_sfnt_off0000f125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF125 10772 bytes
SHA-256: aafea07649a4a3411b59b29b2af24d40c4b8a3d0de226634c5a0ac11d4e0a82a

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