Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f9fe004b5a9203…

MALICIOUS

PDF

65.6 KB Created: 2021-02-23 21:48:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1c1aa43252515ef8b1c82745ec66c19b SHA-1: 38ed730569af0de667490aafe578de3f520e7c95 SHA-256: 45f9fe004b5a9203388797e933e18d281953343a0cf76b3dd6a8f5a722a28321
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://jottigo.ru/wix?keyword=el+encuentro+del+ma%25C3%25B1ana+2020 PDF link annotation
    • https://bobovisosusare.weebly.com/uploads/1/3/5/3/135394734/985833.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382621/normal_5fd62b1d4d8fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420222/normal_6031b8e16cc63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373749/normal_5fc8a6f6014c6.pdfIn PDF document text
    • http://osthondroz.com/angular_ivy_renderer_performance2qmhx.pdfIn PDF document text
    • https://cdn.sqhk.co/lilomovetum/BPigphb/divaris_real_estate_reviews.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367938/normal_6003461187290.pdfIn PDF document text
    • https://nefabilaj.weebly.com/uploads/1/3/1/4/131438225/fezajasuvimovobem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421780/normal_6009abf37230e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495525/normal_5fe23b485cd1c.pdfIn PDF document text
    • http://kungfumalibu.com/32667684177metri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414161/normal_5fdc37f0cbb00.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/binaural_audio_samples.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_off0000c0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E0 5348 bytes
SHA-256: a7bb4c58acf05bd616dc68759bb1d09f642cdcc487f7d2d48ac822209b54f919
font_01_sfnt_off0000d2b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B3 11424 bytes
SHA-256: 4b19467ddeabd31730a6e54b07d9b18e98412010d4a04028ff00f0c13f5a4d34