Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9329d69fb32274e…

MALICIOUS

PDF

76.8 KB Created: 2021-05-04 05:50:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fcfd36f4a3949d1a5b5371f831543b1d SHA-1: 2dd59c8ae6ef91370ae2c35af18cd411ec162e4c SHA-256: d9329d69fb32274edaba952cdf6d952010c2aa8750b7ef609d45d81836bcfdb6
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL and the document body, which mentions resetting a Motorola phone, are likely lures to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=como+resetar+celular+motorola PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405899/normal_603f917927466.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473410/normal_601aac0af2951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451220/normal_603d7bb870287.pdfIn PDF document text
    • https://cdn.sqhk.co/torujazelome/xiehdha/24323315801.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448551/normal_5ff78d9203647.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377381/normal_605d3fa17538c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419430/normal_5fdf57cd33866.pdfIn PDF document text
    • http://nerroba.info/what_does_news_break_app_cost2w5r9.pdfIn PDF document text
    • http://tronreserve.online/51690867460ipijj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404750/normal_603441dcaa860.pdfIn PDF document text
    • https://jugurapofan.weebly.com/uploads/1/3/4/3/134339640/tigifalewazire.pdfIn PDF document text
    • https://cdn.sqhk.co/rurizibaxami/iijRhjd/furofexurerotezubalex.pdfIn PDF document text
    • https://titumakusijuvap.weebly.com/uploads/1/3/4/3/134353199/7946288.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425917/normal_5fec24d1e74ad.pdfIn PDF document text
    • https://cdn.sqhk.co/zekafomaze/NihiaLf/digital_marketing_courses_online_free_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470027/normal_60248f425d6a8.pdfIn PDF document text
    • https://lonopenofof.weebly.com/uploads/1/3/4/8/134895818/70faf.pdfIn PDF document text
    • https://kidubaviputotej.weebly.com/uploads/1/3/4/5/134520398/4179550.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/xunilukegez/zaliduwogipulaxixuxi.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/77430643550.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/siwovimorifitus.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_off0000eccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCD 4848 bytes
SHA-256: ca6002a17d277d44aa12c69d96bb13a8cda58368160f9e60c8e1be4ba8247d5d
font_01_sfnt_off0000fd26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD26 12636 bytes
SHA-256: e778772128d1715a22a230444a2506b015bd238c90b3a419dacfd9ac7f06aff8

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