Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af3aa02c44966a6…

MALICIOUS

PDF

81.8 KB Created: 2020-11-17 20:16:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-06
MD5: 9c169a15f045b3ccc7ff49e3e3e0f78b SHA-1: 6f67da069ef46e15f280f9932fd4469da4254f4f SHA-256: 4af3aa02c44966a65426f2874cbff90cd13f87a5b25ff13e13966dadb3d44fd6
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=the+tree+of+the+knowledge+of+good+and+evil+translation In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f8ca28b1f58c.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/7805117.pdfIn PDF document text
    • https://rabexowubomisuw.weebly.com/uploads/1/3/1/4/131407155/jilaj-gizejajasinux-musijiluleni-gataduvez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405194/normal_5fa1e1e93d32b.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/fofeguj/world_map_printable_free.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/noxijasedomepeluzegil.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/sap_crm_interview_questions_accenture.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/pokemon_tower_defence.pdfIn PDF document text
    • https://s3.amazonaws.com/bidejonixom/zagg_keyboard_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ea4a5ed-7be3-40aa-9372-9ec747d6087c/kapoor_and_sons_torrentz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41033433-0d67-4fb4-bd31-bdc63f357daf/race_car_drawing_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb473c25-b253-44f6-8e76-5c043a8e68de/gugopupolidipud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aa5ae83-a9ab-40c3-8bfb-7fe07869aa1c/tixebopimerifevesetif.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE667 5332 bytes
SHA-256: f07e49fbe1c6222491d5702764ba7f73395d0fc79e9bbbea7be19b970f49970b
font_01_sfnt_off0000f89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89C 13856 bytes
SHA-256: c1a53dbb24d953744861a02cc2ae96a150d1c75e2fa48234a017387c01c4c80e
font_02_sfnt_off0001247a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247A 16316 bytes
SHA-256: 28472a57270255ab3eaf7bfef4e500001c1fa3093b76db943ae929b3d5873736

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