Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2e47cf047c4e516…

MALICIOUS

PDF

73.5 KB Created: 2021-01-02 20:29:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 310ee52615f74e1d2058113de2dba72f SHA-1: 27a424bbfc02213aeba1f97f19e2af54b87b0772 SHA-256: b2e47cf047c4e5168b1726bafa9de86e45287884a2827ca50378c92d755e258b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, indicating it functions as a link farm. Several heuristics, including ClamAV detection and an ML classifier, flag this PDF as malicious, specifically as a phishing or trojan. The presence of embedded URLs and the overall structure suggest an attempt to direct users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/123?utm_term=bucks+text+alerts PDF link annotation
    • https://cdn.sqhk.co/vagewovupug/7icjjif/pmp_project_management_professional_practice_tests.pdfIn PDF document text
    • https://gedolumu.weebly.com/uploads/1/3/4/7/134761272/013745.pdfIn PDF document text
    • https://kaxutaxi.weebly.com/uploads/1/3/4/3/134387751/7d5702f49d4c5c7.pdfIn PDF document text
    • https://zenerabu.weebly.com/uploads/1/3/4/8/134870876/6554399.pdfIn PDF document text
    • https://nofizosol.weebly.com/uploads/1/3/4/5/134500220/vatikige.pdfIn PDF document text
    • https://tuloforukidape.weebly.com/uploads/1/3/4/7/134752744/jokuxokaveme_poposifujuruso_punidilib_zunutataguz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2f6c908-d5bf-415b-abe4-b7b94773b008/aptitude_test_for_engineering_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/404532d4-b241-4871-a339-e19e00cf94e0/wow_macro_guide_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e0d97b0-349c-44d3-b677-3a63642f5a96/mevivuxuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/bewafa_status_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1de1b65-0828-4fcb-b4a3-f24252d3ca06/wupuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a6841f1-fad8-4b3d-81e9-8ad9d107cefa/kubobaremirisawid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45b4d015-509e-47c6-b0c4-f60b4571c319/padman_full_movie_hd_download_with_e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70596c2a-9b82-409c-b1e6-4a3bd3b5b475/79345661313.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_off0000e5b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B6 4972 bytes
SHA-256: 4d8e958dc37d1d7ee06e38e4dd669c5c7cc6307ab7eb729c79d1d7510934d1df
font_01_sfnt_off0000f6b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B4 10144 bytes
SHA-256: e3b2ac9fdc0ff27f4e2540435f9da401baeb491e3711e4ee43a05718829d47bd

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