Malicious PDF — malware analysis report

Static analysis result for SHA-256 00b6912b11f71568…

MALICIOUS

PDF

79.0 KB Created: 2021-06-10 10:33:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a9ad7cddc3acbf72bfa4b0a57bdb598 SHA-1: 690f17bb39b817c84da664bc207eb0e276b1fdc0 SHA-256: 00b6912b11f7156848a1be88124e2542fcb8b4f3d606ebd7063b2a193eaa3323
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary lure appears to be related to 'how to reduce chest fat for male exercise', directing users to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs strongly indicate malicious intent, likely for phishing or scamming purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://infrive.ru/pbw?utm_term=how+to+reduce+chest+fat+for+male+exercise
    • https://janunawavi.weebly.com/uploads/1/3/4/3/134314220/f583029f148.pdf
    • https://saritubix.weebly.com/uploads/1/3/4/5/134507132/pinujememizeviwani.pdf
    • https://nagozexifetuli.weebly.com/uploads/1/3/4/3/134340384/4304538.pdf
    • https://bawenijujobafo.weebly.com/uploads/1/3/4/6/134670929/gisizidunuroj_jufegabovizid_sadafokelu_bumoxus.pdf
    • https://risenezapaf.weebly.com/uploads/1/3/4/4/134481661/mugetufab-giwozonupikutuw.pdf
    • https://vumorusumanipav.weebly.com/uploads/1/3/4/2/134234742/nasevetiza.pdf
    • https://korisupugi.weebly.com/uploads/1/3/5/3/135308649/fisezaweveva_nizogune_gevonumugibus.pdf
    • https://javudufopatoka.weebly.com/uploads/1/3/1/6/131606124/d425c18.pdf
    • https://nugaginidej.weebly.com/uploads/1/3/4/4/134475369/6257098.pdf
    • https://wovugijewinekox.weebly.com/uploads/1/3/0/7/130739614/sumirukipe.pdf
    • https://juvezunadu.weebly.com/uploads/1/3/5/3/135306862/6958984.pdf
    • https://dijemafewume.weebly.com/uploads/1/3/5/9/135992897/8567211e587b72.pdf
    • https://bavibexovapow.weebly.com/uploads/1/3/4/6/134643610/f3e9c9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://midevodimu.pbworks.com/w/file/fetch/144448740/15263623928.pdf
    • http://funasazixi.pbworks.com/w/file/fetch/145036326/nuraz.pdf
    • http://jowukon.pbworks.com/f/dd_character_online.pdf
    • http://zuwofig.pbworks.com/f/50970726340.pdf
    • http://fafevupu.pbworks.com/f/mukomi.pdf
    • http://nukuxim.pbworks.com/w/file/fetch/144508830/82518588935.pdf
    • http://joromonepa.pbworks.com/f/getotibimoburatiposibinox.pdf
    • http://kiletejude.pbworks.com/w/file/fetch/144427479/deivangal_ellam_thotre_pogum_mp3_song.pdf
    • http://nitezug.pbworks.com/w/file/fetch/144893808/julamumazidafasurefekake.pdf
    • http://vazesuna.pbworks.com/w/file/fetch/144502209/89741151124.pdf
    • http://gibuwodebu.pbworks.com/w/file/fetch/144513924/trauma-focused_cognitive_behavioral_therapy_tf-cbt_for_adults.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f738.bin
fdc58787bab9b4707bd4d27b8646a7678a5f98a6e4cc3a574ddba0dd6eb513b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF738 5380 bytes
font_01_sfnt_off00010970.bin
2644f1f88a2c6f302d986cdb99f93235b5ada9b632dea725e23ecc173e50c6d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10970 10836 bytes

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