Malicious PDF — malware analysis report

Static analysis result for SHA-256 683d607c59a036ef…

MALICIOUS

PDF

70.9 KB Created: 2020-12-24 15:03:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 933a5e1a31f9abb3bb43a06831d03486 SHA-1: e8a5bbd44a92dbfda3a6b2a6b8c74c5193a4f699 SHA-256: 683d607c59a036efd35ce5dbfdc1d45effcbde3043cac7599ebea2e0956966f4
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, many of which are to PDF files, suggesting a link farm or SEO poisoning attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URL 'https://trafftec.ru/strik?utm_term=run+sackboy+run+hack+download' is a primary indicator of the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/strik?utm_term=run+sackboy+run+hack+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486994/normal_5fac1afda9c9e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389394/normal_5fc609fcd9345.pdfIn PDF document text
    • https://cdn.sqhk.co/vogoxaginoje/49gchcu/74789923875.pdfIn PDF document text
    • https://zijubanefim.weebly.com/uploads/1/3/4/3/134349059/f687fb07c.pdfIn PDF document text
    • https://cdn.sqhk.co/vekasurox/RUMUao8/babefoniwazavopi.pdfIn PDF document text
    • https://cdn.sqhk.co/soredepel/briaqLj/43676231304.pdfIn PDF document text
    • https://cdn.sqhk.co/fakobijo/1gb5gfL/turbo_drift_3d_car_racing_game_mod_apk.pdfIn PDF document text
    • https://lusukukupesakub.weebly.com/uploads/1/3/0/8/130815137/8605897.pdfIn PDF document text
    • https://cdn.sqhk.co/tiruxugajo/GY1bhhD/metropolitan_fiesta_5_theatre_santa_barbara_ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465924/normal_5fb7c575d7861.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375690/normal_5f91304782ef5.pdfIn PDF document text
    • https://cdn.sqhk.co/zezoxomop/jehgYUy/strikemaster_lithium_40v_10.pdfIn PDF document text
    • https://cdn.sqhk.co/zezoxomop/ojeihec/planet_fitness_locations_midtown_nyc.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/013e321c-ff3b-4e13-8b5e-c3a779a6e9f0/animation_throwdown_mod_apk_revdl.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_off0000d710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD710 5432 bytes
SHA-256: 578433f426c1a26ec08fae846637a1c3e26c44a230062633de30d268aacfe497
font_01_sfnt_off0000e99c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99C 11140 bytes
SHA-256: 4b3e5cf69d1eb212fa3679d00c24da9e96ca72d5c386cc29f7a9b8d8c421f672

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