Malicious PDF — malware analysis report

Static analysis result for SHA-256 672bf1cd6a7a986f…

MALICIOUS

PDF

69.6 KB Created: 2021-02-06 06:17:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 52f83f20dea9d0c53603ba1785e37052 SHA-1: 09e80db6519a7ca38adda1a5f749cf04f6a0b94e SHA-256: 672bf1cd6a7a986f72a140581b1030d4745bd47391c19949bcbb513e88d478b7
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=feeding+bees+during+the+winter PDF link annotation
    • http://vas-rem.ru/cima_e3_study_text_strategic_managementw7y86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479254/normal_5ffcb77cb91b0.pdfIn PDF document text
    • https://jekaboda.weebly.com/uploads/1/3/5/3/135398795/vezasekavimudo.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/figgctz/evolution_2020_las_vegas_residency.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383136/normal_5fde58ca35158.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427499/normal_6002877908b6f.pdfIn PDF document text
    • https://cdn.sqhk.co/sepokafaru/iegfibq/bass_booster_and_equalizer_pro_mod_apk.pdfIn PDF document text
    • http://yildirimotobursa.com/carol_dweck_mindset_downloadqda59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368772/normal_600f553e5a73f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414488/normal_5fe4b6ae36339.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486981/normal_600508a0ee114.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/jbhfgw9/download_wrestling_revolution_3d_mod_apk_for_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416132/normal_5ff57b106a1ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387243/normal_5ff3ccb8cc8e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403685/normal_600f591e872ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD355 5032 bytes
SHA-256: 6016fe49cec81a97e6d31fb9fd258c05951f16586d28f9475c889784b49717de
font_01_sfnt_off0000e482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE482 10896 bytes
SHA-256: efadc253d0927f784fed35a0750ba185ce32cb2c7e7cde74e69ecc75d7e0ecd6

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