Malicious PDF — malware analysis report

Static analysis result for SHA-256 9082acdb3734f61a…

MALICIOUS

PDF

123.0 KB Created: 2021-01-03 23:47:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e65ca18287030f7096463a8f57ca78c3 SHA-1: a3060b9b04fcb9c190cc82b626bbf2e48ec24898 SHA-256: 9082acdb3734f61a6a6d54e4f0a148b34eb4caa8440a0b7b9dde863e088918b9
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 'traffine.ru'. ML classification and ClamAV also flagged this file as malicious, specifically as a phishing trojan. While no scripts were extracted, the presence of a malicious URL strongly suggests an attempt to lure the user to a phishing site, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/aws?utm_term=eq+traders+research+guide In PDF document text
    • https://cdn.sqhk.co/nusideja/hbFifk1/jetad.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/jc7jgnV/bike_mayhem_mountain_racing_paid_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pigujoxexate/dhaHhbw/46485078589.pdfIn PDF document text
    • https://cdn.sqhk.co/gekobegij/e6ggjiq/cubera_snapper_fishing_florida.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/biwubeleba/jimaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dc49b4e-8d8b-44d0-83ea-3530ff992257/66340740844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/743d7fc6-91f9-4fa7-b568-5e010a591422/nufotir.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/53759369608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8b83e76-b411-4063-bb2b-fbc84205531e/nuzofuvisisokujonunejud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac652804-90a5-4213-ae65-ca1bc88cb5f2/green_pepper_nutrition_potassium.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/wovak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cbfe571-dd48-48ff-9da3-b5e66b1b0e22/314880302.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_off0001a1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1CE 5252 bytes
SHA-256: 8c833aba2ee3031192273fa1ea1a8e156289cbdb6587e08ba0f73922750fd97a
font_01_sfnt_off0001b39e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B39E 15320 bytes
SHA-256: feee1d56cd0c56706e9757f59cc63534a3684517f9c9f7e69371f82ed1339c31

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