Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0dbe70a4f03de9b…

MALICIOUS

PDF

80.1 KB Created: 2021-03-16 01:41:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 18d3b5f466cd53ce1ea2ecbb8a7a288d SHA-1: 493b5e46ce809b31e22cd803f271437c14fe9d8f SHA-256: f0dbe70a4f03de9b3eba781b9ef00035344115aac92310a001058661787c7e0a
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs, suggesting it functions as a phishing lure or a link farm to distribute further malicious content. The presence of embedded URLs and the overall structure point towards an attempt to trick users into visiting 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://botokaw.ru/123?utm_term=standard+nuts+and+bolts+dimensions.+pdf PDF link annotation
    • http://zakukamupavi.22web.org/mudux.pdfIn PDF document text
    • http://mevakimuvu.mypressonline.com/pagesedowagowuzej.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/kenmore_70_series_washer_not_draining_or_spinning.pdfIn PDF document text
    • http://beach-fruit.fun/the_freelance_manifestoeit3m.pdfIn PDF document text
    • http://kakorezikudu.mypressonline.com/61601112467.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387060/normal_5fe7d5fe21248.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490251/normal_600341e6bb541.pdfIn PDF document text
    • http://pagebake.com/6814703713oemll.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/puwux07fug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366309/normal_5ff152bea2d8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426090/normal_5fd9c0cb6c2ed.pdfIn PDF document text
    • http://manoligixave.66ghz.com/business_performance_analyst_admiral.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402963/normal_602b4d934643f.pdfIn PDF document text
    • http://palitra-cveta.ru/884237646983jk92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422150/normal_6004b06dd895f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kenuzuwemonuda.epizy.com/how_much_does_it_cost_to_bulletproof_a_6.0_ford.pdfIn PDF document text
    • http://lesasesodimavun.epizy.com/32142317664.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_off0000fa7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7C 5464 bytes
SHA-256: 0b41eae482c124c362a0ab9bdf7a446378053e7599bb09d78d92b881c2944100
font_01_sfnt_off00010cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF1 11264 bytes
SHA-256: a622b1ab3b92b356fef359fc0441c2116f63567c78780b23194970529eb31cd7

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