Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ce61a952853437…

MALICIOUS

PDF

70.4 KB Created: 2020-11-25 04:00:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 162b86ed4729ca3789949106b9688a2d SHA-1: 16f384e4fe4aa46960bd3ea3e47e2dcbce5fd28c SHA-256: 14ce61a9528534375a9a2767da315de501e7fcbe7899f190ee1ea3a4a3e09506
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM', suggesting a tactic to manipulate search engine results or redirect users to potentially harmful sites. The presence of embedded URLs further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://trafftec.ru/strik?utm_term=friends+of+the+valley PDF link annotation
    • https://ginufadep.weebly.com/uploads/1/3/4/6/134668932/dutikadutivilow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408195/normal_5f98cea75e584.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/zuses/tamil_new_video_songs_2019_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/91824620853.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/20861762026.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/mitchell_labor_guide_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/xifokamamusekipaxonebu.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/12451221329.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/the_nature_of_approaches_and_methods_in_language_teaching.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa41f658-b586-4e49-939f-1d5bb6364b16/vixemamozorilufarijazu.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/kenafaregiwoxigox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98bb6718-e8d0-4564-85d5-d0e2afc204e9/gleitmo_chemplex_750.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_off0000d947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD947 5112 bytes
SHA-256: 6fd8a3b48f362ca6cd2aa24fa98d97246b70f018e2a839f7eac585d42d7e573d
font_01_sfnt_off0000eab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB4 10120 bytes
SHA-256: 6121c9eb59388707827170030165db657017692df68e1ead1b1b90d748472e2b

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