Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d244c54b8efeb3…

MALICIOUS

PDF

73.2 KB Created: 2021-04-29 16:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a29b8b534ec0277f65f500f234dfd434 SHA-1: 69e524c7c7f19ef6fbc8755b49d670185978a940 SHA-256: 86d244c54b8efeb34e6726fe71a072795549b6c553bf19a85a41df39ea8a7f4d
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URLs, with a primary lure pointing to 'https://jumiwimov.ru/strik?utm_term=bible+study+for+couples', disguised as a Bible study resource. The PDF's structure and embedded content suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://jumiwimov.ru/strik?utm_term=bible+study+for+couples PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451737/normal_606e6f916de57.pdfIn PDF document text
    • http://1xbet-registrat.site/brave_eagle_trainerdh357.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428062/normal_6038e2f3ac30c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370533/normal_5fdf4cf4e0e13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456166/normal_600a7ae26963c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475864/normal_5fd5ff0057153.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497082/normal_5ff39297375b8.pdfIn PDF document text
    • http://lnstagramsupportingcenter.com/wildgame_innovations_camera_showing_error_messageo09pf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_606d18abe8678.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468259/normal_6057acb83f316.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366408/normal_5feffdcaa9d53.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pegewolonu.rf.gd/codename_villanelle_book.pdfIn PDF document text
    • https://9d3edb37-11ce-4d87-b861-4f8d850d55a0.filesusr.com/ugd/0d2aa0_fb7a036867df47ad991cbffd93f3d977.pdf?index=trueIn PDF document text
    • http://bonitadobizaw.epizy.com/72056593318.pdfIn PDF document text
    • https://665985ba-8e9f-4173-b993-17a3090d61d7.filesusr.com/ugd/08421c_ada4b0d709f2427cb8e21a6eb06f3c50.pdf?index=trueIn PDF document text
    • http://wovidoxof.rf.gd/bupipe.pdfIn PDF document text
    • http://gigupagupefexo.epizy.com/47289137222.pdfIn PDF document text
    • http://rawarawoxegig.epizy.com/famaze.pdfIn PDF document text
    • http://badokelo.rf.gd/13845214832.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_off0000e165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE165 5228 bytes
SHA-256: 6f910671fabfa3d555b2e6b63ad96d3afbfe87c209a3e5a31a9a67bee3847d34
font_01_sfnt_off0000f349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF349 10724 bytes
SHA-256: 896a8d87d5533f62ba5a0dc6638257ed66d9df804e6cdae8f8ab642c686565f5

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