Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0e6c656fa4d67d…

MALICIOUS

PDF

69.7 KB Created: 2021-02-13 21:17:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 67dd65af4a93c90b51c40c627047a034 SHA-1: 7d4b14681e63bb245abcb61dc045c9cd33ec8b46 SHA-256: ad0e6c656fa4d67db9e468936b59cdccd44af96a0c042700c625639e7be7cb89
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is designed to lead users to potentially harmful sites.

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://jottigo.ru/123?utm_term=the+devil%2527s+highway+quotes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420468/normal_600d156be7f5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486193/normal_5fd332f4c8f8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379034/normal_60004f0eeef66.pdfIn PDF document text
    • http://private-channel.site/xavokaxakefesogumasxqhro.pdfIn PDF document text
    • http://creamwalls.space/the_aliens_annie_baker82a1p.pdfIn PDF document text
    • http://gukimunejorupod.iblogger.org/honeywell_wireless_smoke_detector_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444657/normal_6000409ca1efd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426418/normal_600b9e46583d4.pdfIn PDF document text
    • http://znalomstvavip.site/daily_devotional_2018of48x.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/dog_wallpaper_full_hd_downloadyvxxy.pdfIn PDF document text
    • http://app-3null.com/leraxuworukesigifyhhac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457318/normal_5fcee6c03506a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456114/normal_6010a00226771.pdfIn PDF document text
    • http://abwaab.su/pigamixurepawufadijipokaxm122a.pdfIn PDF document text
    • http://carishr.com/katuveliviwijilurpywg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tejoratu.epizy.com/apocalyptic_guide_persona_5.pdfIn PDF document text
    • http://kutadomirezo.rf.gd/vedewawujamanozatolelof.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_off0000d253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD253 5352 bytes
SHA-256: 8def43258ae3b138ee593f2da0291c52bbb586b69566a1ebaa9a22c9449a7c96
font_01_sfnt_off0000e4a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A2 11168 bytes
SHA-256: f60c775a504cb531a26d442e7699b418f36a267caf39d2deb67e18e0eba965a3

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