Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cdeb6f55ac26709…

MALICIOUS

PDF

62.3 KB Created: 2020-11-23 08:48:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 37ea3856ea363fef783c1c7c85a70375 SHA-1: 92a5e61e4c212f5e6b3fc4151bc2dc2e8fbf1283 SHA-256: 1cdeb6f55ac267091da7f043138564a3fa5e7296750f23796e0e257836e5d928
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, with one notable link pointing to 'traffking.ru', suggesting a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports malicious intent. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' indicate an attempt to direct users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/aws?utm_term=dj+ka+full+form+kya+he PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375340/normal_5f959cbfa791b.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/tomulejojemoru-fudegebarep.pdfIn PDF document text
    • https://metozalolak.weebly.com/uploads/1/3/4/6/134610510/tetirem.pdfIn PDF document text
    • https://bopatixenokukab.weebly.com/uploads/1/3/4/8/134873261/fawudimowuf.pdfIn PDF document text
    • https://wejakoguxi.weebly.com/uploads/1/3/4/3/134324676/xazuj.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/8e2f195f-72f2-40f5-b8f5-c4e256d8f811/abiotic_factors_in_the_taiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/983aa835-2055-40fb-80d6-b25aaaf3a42e/46641070474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd3d1952-c50c-4082-810f-105209841fc2/76570048181.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd8985bd-f5b9-497a-a503-2f8a1f1dcc4f/montana_land_for_sale_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cfe8bfd-0067-4df7-bf0a-41a5cc86a75e/nezenerokuxaguwegagil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4a1ba83-640f-4225-8427-12ce0a2a264b/a_series_of_unfortunate_events_spyglass.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f67c50e5-5c7f-4f86-a886-df40b4698427/5573053328.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_off0000b945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB945 5068 bytes
SHA-256: ef5fbca3b88c7c876a9d20c7c402f9a0b0dce68afeebc70958e6c31d57b60e77
font_01_sfnt_off0000ca71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA71 10060 bytes
SHA-256: 5ee77c76e38cf378258a37229ce6c299b14a7cd754b35c7f8e75dbabe3c69571

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