Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e73b1add7ff4e37…

MALICIOUS

PDF

68.6 KB Created: 2021-01-16 15:34:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 75a4221716953e42a0351c0f2f50e3ec SHA-1: b2bcc92eaf2c066e73d4c194086e6184341bd325 SHA-256: 6e73b1add7ff4e3711c52b1a70bb7325f0b2d641996a221c5e57612f3bf6d650
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 'traffmen.ru'. This URL is likely used to redirect the user to a malicious site for phishing or to download further malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/123?utm_term=hhmi+biointeractive+virus+explorer+-+student+handout+answers In PDF document text
    • https://site-1248725.mozfiles.com/files/1248725/kogama_and_install.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/aWgdqKL/steam_sales_2020_list.pdfIn PDF document text
    • https://cdn.sqhk.co/xezojutatow/gAUAShd/sms_messages_machine.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/jc9NiaN/93103900464.pdfIn PDF document text
    • https://cdn.sqhk.co/dejojoduzi/iWGJjdm/tuzewafa.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/wfSZhgA/7373190310.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/3a671S7/video_poker_app_real_money.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_5fab368be0b2f.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuwegijelo/I09igic/color_balls_cool_math_games.pdfIn PDF document text
    • https://cdn.sqhk.co/vekokoze/ie6jcjf/rukaxuxisokepezixexomele.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420752/normal_5fdbb079a1299.pdfIn PDF document text
    • https://cdn.sqhk.co/vuritukupus/cjiK9gj/tower_conquest_mod_apk_hack_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368953/normal_5f87a25c2c406.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425238/normal_5fb6cc7bba722.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cc1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1A 5668 bytes
SHA-256: c766d72c374738914a39ae6dfe3f91a1cf2977b33cff42a60e565732eb8f03dc
font_01_sfnt_off0000df43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF43 11220 bytes
SHA-256: 73653f680b2ff1873236e42bc50674fbc6ff126444c0e76c2be3e957cef0f4a5

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