Malicious PDF — malware analysis report

Static analysis result for SHA-256 410cc647e6dfec22…

MALICIOUS

PDF

65.4 KB Created: 2020-11-24 07:36:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9e100441bef001f9e0d6aa27bfed7038 SHA-1: 6ad20dbc494cd71dc6bd4a74998866ef5b13e777 SHA-256: 410cc647e6dfec22674a002f30ee33cbbf972efa30b963c2ab1667255f07fae2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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/strik?utm_term=hitman+summer+bonus PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368731/normal_5f8be60ac78d0.pdfIn PDF document text
    • https://fupefasupemeze.weebly.com/uploads/1/3/4/3/134315788/cf8e1839ab1a.pdfIn PDF document text
    • https://vumuzuvi.weebly.com/uploads/1/3/4/5/134506571/2181e862d.pdfIn PDF document text
    • https://lobizuwoxigamog.weebly.com/uploads/1/3/4/5/134515373/7d1577e79.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/difofa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413703/normal_5fbc3f9ada6d8.pdfIn PDF document text
    • https://jedunifoxawixe.weebly.com/uploads/1/3/4/4/134458330/kotekuwaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377414/normal_5f93c3eeaa518.pdfIn PDF document text
    • https://xogofodaromaf.weebly.com/uploads/1/3/4/3/134387758/kutakowosavev.pdfIn PDF document text
    • https://waxebusesu.weebly.com/uploads/1/3/4/7/134770319/pesupixo.pdfIn PDF document text
    • https://bovuvodesibos.weebly.com/uploads/1/3/4/3/134377535/6f8962224ce.pdfIn PDF document text
    • https://gobumireg.weebly.com/uploads/1/3/1/3/131383916/a48b0b15e6.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/vutame/86691579130.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/bexizerikixamukiso.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/fukewupu.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/42790332653.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_off0000c47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC47E 4900 bytes
SHA-256: 7256c7608eb4b2888f91cd1083d41e5d97b6d568423a2b79a719c69c08086931
font_01_sfnt_off0000d506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD506 10688 bytes
SHA-256: f2dbc126da05e19d3b4cadfc6e8f194dbb4479267a897465dab8585af72fba05

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