Malicious PDF — malware analysis report

Static analysis result for SHA-256 487b828c26d7eafe…

MALICIOUS

PDF

73.0 KB Created: 2020-11-24 06:02:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3a6df1488b5377b41341c4f413dad54f SHA-1: 16df151b219933583ecd8d79697d6de1c6d38258 SHA-256: 487b828c26d7eafef9d81ec4b0ea92782c5d0b95aabbff563dd4ae510b06e038
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of numerous external PDF links suggests a link farm designed to obscure the ultimate destination or to distribute malicious content.

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://traffmen.ru/strik?utm_term=naipaul+one+out+of+many+pdf In PDF document text
    • https://kuxaxamolexude.weebly.com/uploads/1/3/4/8/134869233/672597.pdfIn PDF document text
    • https://lunudarekilaxaf.weebly.com/uploads/1/3/4/3/134315691/julovonupepop.pdfIn PDF document text
    • https://kajurizekevebok.weebly.com/uploads/1/3/4/5/134586758/tejifisokuje-bokadamagupize.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/7e7a39.pdfIn PDF document text
    • https://xirovule.weebly.com/uploads/1/3/4/7/134749068/8842118.pdfIn PDF document text
    • https://vebaxifi.weebly.com/uploads/1/3/4/3/134360040/1860410.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/badodemebo/matter_unit_study_guide_1_s8p1a.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/fodemowupasi.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/battle_cats_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/falling_for_the_ghost_of_you_read_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/finikedexamamavuvinax.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/verb_present_tense_worksheets.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_off0000e294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE294 4984 bytes
SHA-256: 6a1b163e3faaf02d29f4f73017843d1d9149720c5f6b6bec2d97022cc3994d57
font_01_sfnt_off0000f391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF391 10544 bytes
SHA-256: 4ee358da3188bc864c4d6e0bcf4c3002051fe7d1c8783cabd082d536ad8985f5

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