Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ea4de13ee2041c…

MALICIOUS

PDF

142.1 KB Created: 2021-01-14 20:46:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d3b4d4a32c3557c4d0223a1dc6f86fc1 SHA-1: 7d1ebeb077c122a6c7f6a1dc75fcc4d5638669b3 SHA-256: a6ea4de13ee2041cb1e154b003ef1cddb5abbb177be954dd5b41a91037ad8a94
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=borderlands+2+pearlescent+weapons+shift+codes'. This URL is likely used to redirect users to a phishing site or to download a secondary payload. The ML classifier and ClamAV also flagged this PDF as malicious, reinforcing the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/123?utm_term=borderlands+2+pearlescent+weapons+shift+codes In PDF document text
    • https://cdn.sqhk.co/mevexobuzur/iHLylje/game_launcher_app_use.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/bxjfFIk/walinukipovamafizanoxojix.pdfIn PDF document text
    • https://site-1173169.mozfiles.com/files/1173169/12781469740.pdfIn PDF document text
    • https://cdn.sqhk.co/tiruxugajo/Gihkv6D/heroism_pathfinder_2e.pdfIn PDF document text
    • https://site-1173941.mozfiles.com/files/1173941/47064611483.pdfIn PDF document text
    • https://cdn.sqhk.co/fomezawelud/7TUePuI/sculpture_definition.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/degisapemifa/kartilya_ng_katipunan_english.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/bonololezorupotifesa.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/pabizuregujer.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/73928325021.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/7546266462.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_off0001ef68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EF68 5516 bytes
SHA-256: 3b0aee4bd2dd6ea8630950a5da208c05f55f67adb36832da6024203d2931055a
font_01_sfnt_off0002023c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2023C 11140 bytes
SHA-256: 847c8eb76a1fcef630b23fd9bfe0604c0334cb723000e1adf40c80f98597db30

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