Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f44bbed42c169dd…

MALICIOUS

PDF

136.9 KB Created: 2021-03-04 01:41:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3338b22b935b49f8134f84cc498ecb77 SHA-1: d574be19e436812c97e4ae5e6725ab7b7bf5bd4b SHA-256: 2f44bbed42c169dd3277064fe272bfe1892a6d002916b3860a3333153e81233f
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 0.9996

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://bologen.ru/123?utm_term=best+systems+engineering+master%2527s+programs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417305/normal_602c8373ec167.pdfIn PDF document text
    • http://bibiladiwoz.22web.org/87048340241.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383475/normal_5fd9bf8b735b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478378/normal_601831de29bef.pdfIn PDF document text
    • http://cashthe.ru/company_of_heroes_compressednhjcj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481684/normal_6001fed35fef5.pdfIn PDF document text
    • https://xisuludibu.weebly.com/uploads/1/3/5/3/135300694/04c4840e15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480880/normal_5fcb719b3931f.pdfIn PDF document text
    • https://minibomutax.weebly.com/uploads/1/3/6/0/136011914/2653186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481173/normal_603c44acc4b08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420760/normal_602dde4ed7218.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422373/normal_5fce82c797b39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484115/normal_5ff96a2f4aff5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450434/normal_6016df017ef20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387581/normal_600cfba3b86b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417992/normal_60400deb08707.pdfIn PDF document text
    • http://tvoy-ogorod.online/the_secret_life_of_pets_full_movie_in_english_free_download6s20z.pdfIn PDF document text
    • https://vakenufepuxino.weebly.com/uploads/1/3/4/5/134529081/fulirolovavet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zenudaxefuk.rf.gd/emotional_intelligence_scale_questionnaire.pdfIn PDF document text
    • http://dotenax.rf.gd/telugu_movies_emotional_videos.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001dcf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DCF5 5292 bytes
SHA-256: 3f9eb83f3ce85878a5131bb8f2ef306cc8dd9c2e566bb65f7027940d7316eaf7
font_01_sfnt_off0001eef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EEF5 11312 bytes
SHA-256: 369f796b7604d3492224a99bf31e0bb084e68e261a14643a9f7f09386c9804fa

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