Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34d5a1fa0867f3e…

MALICIOUS

PDF

68.3 KB Created: 2021-01-18 09:54:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 02676ba1483336c519acfd93c2c9e87a SHA-1: 5b47a4043dd82eab92f78a9a23a6809f6aafb6d1 SHA-256: f34d5a1fa0867f3e915cc900cdcaed1373bb3ae905f5290503060008327bb170
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 'traffking.ru'. The embedded document body, though heavily obfuscated, contains strings that suggest a lure related to software downloads ('swf apk not working'). The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the nature of the redirector and the lure suggest an attempt to deliver a malicious payload.

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://traffking.ru/123?utm_term=swf+apk+not+working In PDF document text
    • https://cdn-cms.f-static.net/uploads/4406812/normal_5f9ed1e55e7af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383807/normal_5ff0423513fec.pdfIn PDF document text
    • https://cdn.sqhk.co/jilebodetifa/6YjfZia/download_dead_in_the_box_mod_apk_money.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487897/normal_5fe90e4ddfbd8.pdfIn PDF document text
    • https://cdn.sqhk.co/gaximeme/ohdiggc/dota_underlords_steam_charts.pdfIn PDF document text
    • https://cdn.sqhk.co/xewumoxu/MghhgDB/cooking_fest_the_best_restaurant_cooking_games.pdfIn PDF document text
    • http://detomebokiv.iblogger.org/associations_incorporation_reform_act_2012_nsw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407813/normal_5ffec21404d53.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/simujix/report_power_outage_toms_river_nj.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/70170583428.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/nanubiride.pdfIn PDF document text
    • http://rubujizuz.epizy.com/pathophysiology_of_dengue_hemorrhagic_fever.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/lobstrosity_osrs_guide.pdfIn PDF document text
    • http://zovuzizosagedip.epizy.com/what_is_cuneiform_in_one_sentence.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_off0000cd34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD34 5116 bytes
SHA-256: 8f5c8ced0de076f14082d1f08461f6f1c91a2afb18a312fc019378ba9bae4a9d
font_01_sfnt_off0000decd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECD 10896 bytes
SHA-256: def1d4c3c115d95ca84469748c682354506e70acde158daa6b48981e0d6b2d24

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