Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf44b3ab8faa198…

MALICIOUS

PDF

72.3 KB Created: 2021-02-12 00:22:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 55e0e6b32e4125e021f30ca318f6c03e SHA-1: 91118363e02aff27aac579509afcaf892ae792f6 SHA-256: 6cf44b3ab8faa1988bf4e4f4ffdf591737d0610e8e64d8516de47088c034d8bf
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://leonvi.ru/wix?keyword=mostfungames+happy+wheels PDF link annotation
    • https://cdn.sqhk.co/dujagazatad/ejdL2sa/nezerofuvow.pdfIn PDF document text
    • https://cdn.sqhk.co/nibedogoxov/iigVjfE/barbecue_sauce_for_chicken_legs.pdfIn PDF document text
    • https://cdn.sqhk.co/nenakowi/gj3Tmra/move_to_ios_after_setup.pdfIn PDF document text
    • http://e-devletodeme.net/526977853858lxw4.pdfIn PDF document text
    • https://cdn.sqhk.co/ragekasa/xpUABhe/ark_survival_evolved_pc_server_for_xbox_one.pdfIn PDF document text
    • https://cdn.sqhk.co/gatavikap/mahddHh/67089409032.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/Adn4fhd/pottery_barn_baby_high_chair.pdfIn PDF document text
    • https://jatekokem.weebly.com/uploads/1/3/2/8/132814322/15d61b5c95d.pdfIn PDF document text
    • https://cdn.sqhk.co/sozimelizak/shds3um/weather_arkadelphia_ar_for_next_30_days.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nupifikitove.epizy.com/gepevupavoli.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F1 5252 bytes
SHA-256: d35c608105d4d0af546f980425787c7974e3a22c0551792455e04766aea19842
font_01_sfnt_off0000e2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CC 10504 bytes
SHA-256: ce2dcdd6d6d5df84a581047887703b48332423fcb01692f7bd1c846109ccc4f1
font_02_sfnt_off000106ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CE 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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