Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad1ebc9bf7366636…

MALICIOUS

PDF

76.9 KB Created: 2021-03-16 07:59:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 69eb0d0e8ff06eb8d23b553975694f73 SHA-1: 01942a03a42f56cd376fdce05466ed7ac8638c3b SHA-256: ad1ebc9bf73666361f53ff3b2d22693da4b6919e1104bc33f5ac2c9166c131db
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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 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.
  • 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://maypoin.ru/strik?utm_term=how+to+write+a+training+matrix PDF link annotation
    • https://kebuwusatame.weebly.com/uploads/1/3/5/3/135343151/dukufubadop_dizovaxifekuses.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391896/normal_5fe8eaec2cc38.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369153/normal_5ff78a72df43e.pdfIn PDF document text
    • http://lnstagramsupportlives.com/bomber_crew_game_tips4situ.pdfIn PDF document text
    • https://vinaxana.weebly.com/uploads/1/3/4/7/134725794/3586949.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444647/normal_5ffefc8d13cfc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447431/normal_60032c78ee9a5.pdfIn PDF document text
    • http://smartbright.club/who_is_playing_queen_elizabeth_in_season_4_of_the_crownxfnb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454562/normal_602b2d6679759.pdfIn PDF document text
    • https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/142850.pdfIn PDF document text
    • http://fridgeservice.ru/59339054587yfr6g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477638/normal_6012b6526cfeb.pdfIn PDF document text
    • https://pujowelitolav.weebly.com/uploads/1/3/1/4/131438356/sesatu.pdfIn PDF document text
    • https://masevaru.weebly.com/uploads/1/3/5/3/135346062/kilakumozin.pdfIn PDF document text
    • https://tebobasuzojipol.weebly.com/uploads/1/3/1/4/131407082/3937075.pdfIn PDF document text
    • https://lovizedisar.weebly.com/uploads/1/3/1/4/131437361/takolanimejen.pdfIn PDF document text
    • https://tivepikilusu.weebly.com/uploads/1/3/4/7/134759048/gulodabuboviti.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/jevelel/sawatujisigizidese.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/pivevexodivolabem.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/52189118574.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_off0000f117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF117 4916 bytes
SHA-256: 9f3770d53671f3b927f232a50d605556bc6c91353183edecd7575f460a55124b
font_01_sfnt_off000101d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D0 10620 bytes
SHA-256: a7287e21072ba68fc1d2a1982f4ea12387cbd6bc57f29a26ba4211c0cfe76482

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