Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa4c7c3cb202aa6b…

MALICIOUS

PDF

73.2 KB Created: 2021-02-11 22:22:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 08c9d9f92acf10a961f7b4c9740662b6 SHA-1: 1b9d1e8cb42eec3bf17e8d6dc41703c3dccfd9e7 SHA-256: fa4c7c3cb202aa6bce98f573410952e17037e0b5562d7a4658e8ac6040bc16c3
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=massey+ferguson+65+oil+filter+cross+reference PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4499673/normal_5ffb82d147b76.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369632/normal_5fd042379332f.pdfIn PDF document text
    • http://gloslides.com/dinabandhu_andrews_college_admission_form_2019d8dyd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473971/normal_5ffbc0eb0fa37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495694/normal_5feba105462c0.pdfIn PDF document text
    • http://lorenbayi.com/herobrine_mod_1._16._20njx1r.pdfIn PDF document text
    • http://potolkilife.ru/emergency_sounds_full_albuma2v7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473047/normal_5fe4e3a745720.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374857/normal_600bc5cc4bef4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453108/normal_600615b530072.pdfIn PDF document text
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/bibumogiwuwagoser.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390324/normal_601c5beb6cec2.pdfIn PDF document text
    • http://presentinsta.online/demonata_book_1r1ujk.pdfIn PDF document text
    • http://soteguziropuku.22web.org/dejawitewut.pdfIn PDF document text
    • http://prizinsta.online/840699564864alzp.pdfIn PDF document text
    • https://xavapijiwo.weebly.com/uploads/1/3/3/9/133997403/bojebiwonotipu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jopuzasoxu.rf.gd/45978047709.pdfIn PDF document text
    • http://divamepirinati.rf.gd/2015_acura_tlx_review_consumer_reports.pdfIn PDF document text
    • http://nuxumejaxumem.epizy.com/12628315687.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_off0000e07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07C 5436 bytes
SHA-256: 779173c688a123ef483b9b1d4e33f73206839edf8acf3fefbd382e5a579b091c
font_01_sfnt_off0000f326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF326 10536 bytes
SHA-256: 5a48130d2c9e6fcd29efdca391a5b657c14b874564d66c7c2f2dde86c92aa74e