Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8cedbbdfb30d3e…

MALICIOUS

PDF

76.6 KB Created: 2021-01-28 03:25:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a4daa421ff50e4619590c7f7035d7c4e SHA-1: 70a873f46e6a768816fcbd57482c560445fdfb78 SHA-256: ae8cedbbdfb30d3e70f03a82ed813102c5e347a87d5b57aa230e5df29c19bc06
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

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://traffset.ru/wb?keyword=raid%20heroes%20sword%20and%20magic%20cheat PDF link annotation
    • https://cdn.sqhk.co/reposivekow/5agessI/best_story_podcast.pdfIn PDF document text
    • https://cdn.sqhk.co/zidomirit/iWnqLFt/bamitol_gel_termogenico.pdfIn PDF document text
    • https://jatilupek.weebly.com/uploads/1/3/4/4/134491857/7334bcd16c.pdfIn PDF document text
    • https://cdn.sqhk.co/dodufiruw/8dA7Gih/lufak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427077/normal_600b13c39b5e9.pdfIn PDF document text
    • https://kakituku.weebly.com/uploads/1/3/4/5/134589995/9833258.pdfIn PDF document text
    • https://dodivivedi.weebly.com/uploads/1/3/3/9/133997878/watofufuzowo-nasuraj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454681/normal_600babbcb0f38.pdfIn PDF document text
    • https://talidifixuj.weebly.com/uploads/1/3/5/3/135390844/3b0e7fd.pdfIn PDF document text
    • http://cosmostil.top/zasenexaxomofipalazajzc4m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407777/normal_5ffccdae9e9bf.pdfIn PDF document text
    • http://afracheat6.xyz/cisco_ws-c2960x-24td-l_datasheetwqn93.pdfIn PDF document text
    • https://mamufitixiru.weebly.com/uploads/1/3/4/6/134640278/0266b6.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/xeropizuwe/netisel.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/megewusujowisa.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/xepulubibigo.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_off0000ed43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED43 5420 bytes
SHA-256: 6176b15ae25d20f9046082890d93bc608799178d0c08c0d34ad5497b6dc478fd
font_01_sfnt_off0000ff9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9D 11144 bytes
SHA-256: 6194696e6866d3e5b8525cdf1555c7fe24cfbf32e133cd7d9b43ba1d5a24a9ae

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