Malicious PDF — malware analysis report

Static analysis result for SHA-256 c400bfa209486d6b…

MALICIOUS

PDF

66.9 KB Created: 2020-12-28 08:49:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bc3e2b5f9c1adb834a2fda219de07c3c SHA-1: b4cb05b20182107a9819f616aa05a1117d95e8a6 SHA-256: c400bfa209486d6bb73acc89c06cc3b46a273a8c405b46debd9e043a2f1d6fa3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a common tactic for phishing or SEO spam. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffking.ru/123?utm_term=purdue+cco+login PDF link annotation
    • https://cdn.sqhk.co/gawukale/jdHWhht/90052514479.pdfIn PDF document text
    • https://gowukamumikezaj.weebly.com/uploads/1/3/4/7/134769013/1e250ee303fa.pdfIn PDF document text
    • https://cdn.sqhk.co/momewoziwoge/gjghifc/vehicle_number_plate_apply_online.pdfIn PDF document text
    • https://cdn.sqhk.co/juxerawabuf/hfjdidM/bounce_ball_game_nokia_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gawukale/eAidica/81786557460.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvupalib/je8iagK/carbon_3d_printer_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/AicLipM/vitemoniboniravofuxeberi.pdfIn PDF document text
    • https://debuvubuni.weebly.com/uploads/1/3/4/8/134846467/pebamobojopinek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/96041ec1-3e64-4a29-a99e-3888929d018a/likeable_social_media.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/014e70ba-53cc-4ebe-ae33-cc263348365d/27038643483.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d990091-922d-47fd-beca-e91e6c62cc7d/24115155283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c2fcea6-7d9e-4360-8256-e20808ee9006/84726408700.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7855ea1e-45b4-4347-8861-855e28851e1b/tawetexetifamet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82702d18-1f28-4839-9312-c5ef680395fe/zinaveviv.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_off0000c8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D6 4720 bytes
SHA-256: 0ec30e5bb863402a1addafffd78dee8f172a28c2f5f5057ea5300577afb1824f
font_01_sfnt_off0000d8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F2 11172 bytes
SHA-256: 4c631d18313b4e93214018b9bcb13dff47978915af2090c51d79b7c5cd4ddd6e

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