Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d7f48acda0c72be…

MALICIOUS

PDF

94.8 KB Created: 2021-02-12 23:16:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 58994f5edf8b21724ec0afedcb5028cc SHA-1: 1c904c98d0a055c980d6b3ea43825fd5b63ea089 SHA-256: 2d7f48acda0c72bed31b8d9c03c9f6b15585eb7100d43c6deab9a60e37197579
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one pointing to 'baarspo.ru', suggesting it's designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is part of a link farm hosted on disposable domains, a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://baarspo.ru/wix?keyword=dark+souls+gwyndolin+lore PDF link annotation
    • https://nefatalij.weebly.com/uploads/1/3/2/7/132740339/8869443.pdfIn PDF document text
    • http://disclosures.space/parks_and_rec_pilot_scriptu1fjn.pdfIn PDF document text
    • http://watewuwij.22web.org/free_actors_resume_template.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487626/normal_5fe574d480cf0.pdfIn PDF document text
    • https://rojanebe.weebly.com/uploads/1/3/1/6/131637229/bb337dc87e4d.pdfIn PDF document text
    • http://xonesasa.iblogger.org/comparing_unit_fractions_worksheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451561/normal_601093e9e2507.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459176/normal_5ff36d1e952be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527345/normal_601289315361f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393511/normal_5ffce1b4b4369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_6022a7adc88d8.pdfIn PDF document text
    • http://xukuvapama.iblogger.org/workplace_definition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vutevesofu.rf.gd/vaxerobof.pdfIn PDF document text
    • http://lojupodinitaxug.epizy.com/anime_live_wallpaper_apk_hack_2018.pdfIn PDF document text
    • http://nemebikox.epizy.com/73171380626.pdfIn PDF document text
    • http://madukavinoxonal.epizy.com/wimuxuxivareson.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000129df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129DF 5052 bytes
SHA-256: 669c78a6c577ae8fa0731f1d541d11303e00aa31fa4226cf2ca6b775a1dbed64
font_01_sfnt_off00013b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B31 10760 bytes
SHA-256: 9c556f102999fa783f7e215185ff21da85686de91f490fbfd427ad01c0b4eaaa
font_02_sfnt_off00015fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FC5 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.