Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea9ff317d360e9b…

MALICIOUS

PDF

74.3 KB Created: 2021-02-21 13:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c594d899720464ee7add8307258cd95b SHA-1: ea2b5a63dbdf00194b482a4f90ea7316559f4526 SHA-256: 2ea9ff317d360e9b29a4ac3d7e49cddddb72376701e514c188efbdbe0c7dc9bd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://baarspo.ru/strik?utm_term=sentry+safe+dual+lock+won%2527t+open PDF link annotation
    • http://safagiko.iblogger.org/wusidumiduwejebexotelolu.pdfIn PDF document text
    • http://chatik85939775.fun/pukiseparozafei1sq7.pdfIn PDF document text
    • http://introdom.ru/37165821595bdjn4.pdfIn PDF document text
    • http://kartaidatodemeleri.com/dutizij0fa0g.pdfIn PDF document text
    • http://afracheat3.xyz/47049804071j4q67.pdfIn PDF document text
    • http://6gusevshop.space/disijelociihg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366952/normal_5fc5ca0d921e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373997/normal_5fdbe3470628a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381108/normal_5fd856b09d625.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379601/normal_5fcd10b908aa8.pdfIn PDF document text
    • https://binikefesomeb.weebly.com/uploads/1/3/5/3/135386190/f719c2.pdfIn PDF document text
    • http://gtmedis.com/chemdraw_software_for_mac_freewzl4h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424029/normal_60175c54ec452.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fasevirova.rf.gd/mobile_legends_adventure_wishing_shrine_guide.pdfIn PDF document text
    • http://vizulubafaxal.epizy.com/mujewoliwupinu.pdfIn PDF document text
    • http://sonasekofuxix.rf.gd/self_employed_invoice_template_uk_word.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_off0000e4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AF 5544 bytes
SHA-256: aa9c58b6c99d097107de6a606b168bc6e4de76537b10cd818e69beb8c8da05aa
font_01_sfnt_off0000f7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C0 10796 bytes
SHA-256: 12027614a2e54104858278309accf20414711b4b561b3824ccea15902a5cd441

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