Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e2cb7c1ec6067d…

MALICIOUS

PDF

70.2 KB Created: 2021-03-13 23:31:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bd3c6eabb42274d75608b0596a9a03e SHA-1: 98d0fdff9cfc323a700e1f5dd65fae38bffdcd45 SHA-256: c6e2cb7c1ec6067dd2d1ad193177c88481344cc5557292adf5aec1c9b53430fb
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://vilenefex.ru/wix?keyword=portrait+mask+mblo+khan
    • https://giwuvapelefawi.weebly.com/uploads/1/3/4/8/134869604/8143ee.pdf
    • http://fumexijana.getenjoyment.net/rcbs_chargemaster_1500_instructions.pdf
    • https://pugadaxalan.weebly.com/uploads/1/3/1/4/131437680/walijeteruwoguzib.pdf
    • https://dalideno.weebly.com/uploads/1/3/5/3/135384103/joxuwixineriw.pdf
    • https://vurabagugodemox.weebly.com/uploads/1/3/1/1/131164039/94c2a.pdf
    • https://mubajodopiwal.weebly.com/uploads/1/3/1/4/131454521/wifavonerep.pdf
    • https://lobumemimakagom.weebly.com/uploads/1/3/3/9/133999871/6427914.pdf
    • http://lixorajepidil.mygamesonline.org/beloved_image_free_download.pdf
    • http://fejavodexata.getenjoyment.net/is_wow_good_2020_reddit.pdf
    • https://lidukawovov.weebly.com/uploads/1/3/5/3/135323160/9d1eea6.pdf
    • http://bodipok.getenjoyment.net/interpreting_and_analyzing_financial_statements_6th_edition_solutions.pdf
    • https://nigapabibaba.weebly.com/uploads/1/3/4/9/134903053/menorusezasuwasobu.pdf
    • https://zazalefofano.weebly.com/uploads/1/3/4/5/134578352/9b02c4095.pdf
    • https://kinajerabisar.weebly.com/uploads/1/3/4/7/134748515/voxene-nomesilarusevo.pdf
    • https://fevepoxopimumu.weebly.com/uploads/1/3/2/3/132302951/4721861.pdf
    • https://nipituwosaxow.weebly.com/uploads/1/3/5/3/135312928/fe2de798c.pdf
    • https://mokakabatedi.weebly.com/uploads/1/3/5/3/135300589/8601217.pdf
    • https://bosudire.weebly.com/uploads/1/3/4/4/134456289/ca275f0b0.pdf
    • https://nigomisenavuluw.weebly.com/uploads/1/3/6/0/136095850/8457ad3cc1d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/poresi/cinema_4d_program.pdf
    • https://s3.amazonaws.com/punurum/tumikezalaropudiji.pdf
    • http://bigapenegig.atwebpages.com/takewuzupedojuxuzenis.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_off0000d771.bin
d3902d0e182c2679dbc211a5a40e5903478613326f043fbe1aea356ba5caae8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD771 5132 bytes
font_01_sfnt_off0000e8b3.bin
c2806293996fb8c277aced333cd257cabfa41a9c9d9ae691d8d2669815a610e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B3 10296 bytes

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