Malicious PDF — malware analysis report

Static analysis result for SHA-256 125ac2c87a3d75d5…

MALICIOUS

PDF

77.9 KB Created: 2021-03-14 16:22:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 40e6f717e7a87f159d0e72d4c5a3ba0e SHA-1: d5b19172986a9934928531bb6fb55132ae18baf6 SHA-256: 125ac2c87a3d75d5a0b517be1435feaa31572ce83cdecf8ff7239da37045eeaf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to be a disguised attempt to trick users into visiting these external sites.

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://seumenha.ru/award?keyword=combined+gas+law+sample+problem+pdf PDF link annotation
    • http://vijulofa.22web.org/rufuviduwedoritarazig.pdfIn PDF document text
    • https://nazumuliwoj.weebly.com/uploads/1/3/1/3/131383416/zaberonabujim.pdfIn PDF document text
    • http://salukapebuke.iblogger.org/migokepezukirimi.pdfIn PDF document text
    • http://fimajixilozile.22web.org/zofapibupamakugivuji.pdfIn PDF document text
    • http://wavujilipazi.22web.org/a_sample_vegetable_farming_business_plan_template.pdfIn PDF document text
    • https://lubozukutiximik.weebly.com/uploads/1/3/4/4/134472848/wotuvo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413845/normal_5fcdacb4f1f85.pdfIn PDF document text
    • https://luragelekow.weebly.com/uploads/1/3/4/3/134377287/bokisux-linusovofeno.pdfIn PDF document text
    • http://merikasavotenum.iblogger.org/halfords_mens_bike_size_guide.pdfIn PDF document text
    • https://valabonef.weebly.com/uploads/1/3/1/3/131379230/turili_nixela_xuxopowifewe_kesij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445743/normal_601e998512eb0.pdfIn PDF document text
    • https://jeboxuxu.weebly.com/uploads/1/3/2/7/132710743/kugaxan.pdfIn PDF document text
    • http://rotixumuzu.22web.org/nobel_saregamapa_maa_song.pdfIn PDF document text
    • https://monezoxikaxusoj.weebly.com/uploads/1/3/1/4/131453753/9d900c38.pdfIn PDF document text
    • https://xomowozijirogap.weebly.com/uploads/1/3/4/6/134667332/duwapop.pdfIn PDF document text
    • https://wadazujirala.weebly.com/uploads/1/3/4/5/134596454/3957036.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vatifijagix.epizy.com/cctv_installation.pdfIn PDF document text
    • http://depebovibu.epizy.com/how_to_clean_my_homedics_humidifier.pdfIn PDF document text
    • http://pokazirajig.rf.gd/74893301299.pdfIn PDF document text
    • http://vowukexakajan.rf.gd/iso_9001_audit_checklist_template.pdfIn PDF document text
    • http://zapesezowu.rf.gd/mokaxima.pdfIn PDF document text
    • http://gibonoxemibete.rf.gd/us_army_reserve_pay.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_off0000f1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A0 5500 bytes
SHA-256: 077483c8ca4cbc15fb98fefc3a3c592ab9b82af0f7b1e765e85a7b814cc74a75
font_01_sfnt_off00010447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10447 11092 bytes
SHA-256: 4fc24e80b6a5f1869a2a9cb07eca108897628eda689ff14beb355872fded43bb

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