Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e37d3a03c04aaa…

MALICIOUS

PDF

72.3 KB Created: 2021-01-27 11:03:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 388766917c75211d8823f4fe4d39e8b0 SHA-1: 699073af0658b5861b115904cf05dea5aa3fc55a SHA-256: 72e37d3a03c04aaa6b968dc36a8f3eb6b175d0869f0968302bef793c54556d90
186 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO spam or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafffi.ru/wb?keyword=drumstick%20chicken%20wings PDF link annotation
    • https://kenojulovananav.weebly.com/uploads/1/3/4/0/134016885/7926716.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/oKjffjh/guns_and_glory_zombies_apk.pdfIn PDF document text
    • http://revershjtb.site/88410402073nf8mv.pdfIn PDF document text
    • https://cdn.sqhk.co/bodavadu/iiboGja/39479122579.pdfIn PDF document text
    • https://cdn.sqhk.co/xotolodi/diayhcO/95522660722.pdfIn PDF document text
    • http://prequester.online/37771151930cid5h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460465/normal_5ff5185838b64.pdfIn PDF document text
    • https://cdn.sqhk.co/pategazikiw/dYUCvgi/turn_off_emergency_alert_sound_iphone.pdfIn PDF document text
    • http://gratoramaa.website/eternal_card_game_deck_trackerfzspi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443342/normal_5ffad7feb4a9d.pdfIn PDF document text
    • http://world-wild-shop.com/seviso5gwar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500446/normal_5ff8fd5b1e41b.pdfIn PDF document text
    • https://cdn.sqhk.co/lilanoto/jhadIhf/17765423111.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/mefadedosuw/66742123422.pdfIn PDF document text
    • http://rolaxaja.rf.gd/bubble_shooter_ilyon_hack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/75850485913.pdfIn PDF document text
    • http://zogeragofas.rf.gd/backstab_mod_apk_rexdl.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_off0000de53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE53 5128 bytes
SHA-256: e59764352d584aa7a00aa94c1e91f6dc6b46e1f9afd6aba883deb28bfeb53be9
font_01_sfnt_off0000efbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBE 10716 bytes
SHA-256: 12c5211fab8180b82006b19e09f900d88ca82c6050b90a377c4b2bb169cf05ec

Open this report in the interactive analyzer, or submit your own file for analysis.