Malicious PDF — malware analysis report

Static analysis result for SHA-256 93767466fd01aaab…

MALICIOUS

PDF

70.3 KB Created: 2021-02-08 23:04:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9b044ee2829f71dd4d3785e3db7e4948 SHA-1: e352c0f3d0391e2791e215dba1e92d6aced525de SHA-256: 93767466fd01aaabf4e84ccb7fd3f3f36ec4f922ff99a393e4c173935e4acf55
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=cara+menghilangkan+watermark+foxit+pdf+editor PDF link annotation
    • https://cdn.sqhk.co/tisumusef/idKSibJ/swtor_jedi_knight_solo_build.pdfIn PDF document text
    • https://cdn.sqhk.co/pategazikiw/iafidhj/53378430629.pdfIn PDF document text
    • http://amst-watch-v1.club/6251538602633gb3.pdfIn PDF document text
    • https://cdn.sqhk.co/kalijada/Jr99iee/mixeposem.pdfIn PDF document text
    • http://susurrus.space/midubupi5j33u.pdfIn PDF document text
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/wixerovonipab-silinitiwej.pdfIn PDF document text
    • https://nivujetomut.weebly.com/uploads/1/3/4/7/134753784/bajobakoj.pdfIn PDF document text
    • https://waziketezu.weebly.com/uploads/1/3/4/6/134648841/xexawiwegu.pdfIn PDF document text
    • https://vivuguduwidu.weebly.com/uploads/1/3/2/6/132681484/lunuzak.pdfIn PDF document text
    • https://cdn.sqhk.co/lulamekajasu/ifRygdI/34779634213.pdfIn PDF document text
    • https://cdn.sqhk.co/rinulazopun/SicHgeW/kevewujipumewuzisan.pdfIn PDF document text
    • http://hh666o.site/the_dream_thieves_summarygvpe0.pdfIn PDF document text
    • https://jazejuvo.weebly.com/uploads/1/3/4/4/134439384/4e1f75b71.pdfIn PDF document text
    • https://marotebage.weebly.com/uploads/1/3/4/7/134712984/8f0cbca2f9f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gedexim/zuwirixefizepineso.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC971 5312 bytes
SHA-256: 7b48c5a6b29e40aed2e7425589393744d8692d4e536083637de810b8979dd3e1
font_01_sfnt_off0000db68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB68 10200 bytes
SHA-256: 5428c6646a8aee06264e4ab480aaac955ce72f3684236b319e821ffe3c4df7c8
font_02_sfnt_off0000fe1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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