Malicious PDF — malware analysis report

Static analysis result for SHA-256 abbdbb2847855ebe…

MALICIOUS

PDF

81.7 KB Created: 2021-02-28 12:16:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 42b440989dd7b4a8a02d7a0265638d30 SHA-1: d3a38f4c23e954f8fb355376d569a7329bc5a113 SHA-256: abbdbb2847855ebe7dfecc3519640ed0d0e6e354132de154ff8a4895a0ea6acd
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many of which point to disposable hosting and appear to be part of a link farm. The primary URL, 'https://midufefew.ru/award?keyword=roland+barthes+quotes+love', suggests a lure to attract users searching for specific content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links.

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://midufefew.ru/award?keyword=roland+barthes+quotes+love PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449603/normal_600f7d4024675.pdfIn PDF document text
    • https://kusezobovezuzeg.weebly.com/uploads/1/3/4/6/134689385/2043751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452372/normal_6036b4f883a83.pdfIn PDF document text
    • http://bokevefinobi.iblogger.org/adidas_platform_white.pdfIn PDF document text
    • http://cheapestshop.xyz/football_quiz_malayalam_questions_answerswe7l8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413696/normal_602ef42e65379.pdfIn PDF document text
    • https://bonopabugo.weebly.com/uploads/1/3/4/5/134581776/wezerigusagos-midutodaso-tisoz-ledeme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383692/normal_5fdb7931e5601.pdfIn PDF document text
    • https://genexezo.weebly.com/uploads/1/3/4/6/134616565/ronujiluzisupo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452845/normal_60158a7df0275.pdfIn PDF document text
    • https://rifuxegu.weebly.com/uploads/1/3/4/5/134525143/bc2c800d6ad.pdfIn PDF document text
    • http://sowurokirifi.22web.org/aprendizajes_clave_preescolar_mini_pep.pdfIn PDF document text
    • http://infonewsuk.site/casio_ctk-720_driver_32_bit88ddf.pdfIn PDF document text
    • http://clyb-wylcan3.space/prego_italian_textbook442wn.pdfIn PDF document text
    • https://negozikazaseju.weebly.com/uploads/1/3/4/5/134587396/fegipuw-pudigajoni-vubedo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422386/normal_602bdff86f01e.pdfIn PDF document text
    • http://tuvuvadirozo.iblogger.org/fefegujasowezapat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xapamafoxufovig.epizy.com/nuruxedizagozanonusojipil.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_off000102ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EC 5244 bytes
SHA-256: 4d75b541ef992446d59e1da1b5ad19f7dd9cf733f8054e2417e1e1c113f0087e
font_01_sfnt_off000114bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BB 10864 bytes
SHA-256: 99560a309df80fbc0ac24f4c450c19d1d69093f97ba21ec7066c6aaebaea7c04

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