Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce8c06b8d84eff9…

MALICIOUS

PDF

95.7 KB Created: 2021-01-12 05:04:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3726e3d2db217a872f4c10447c8d0c49 SHA-1: 52ac6165318a8f4584682f2a45084ec686effa8c SHA-256: 9ce8c06b8d84eff9b26410c7403e4634482f6d8d8bb9ad5a1c420f860bda7914
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body appears to be obfuscated or corrupted, but the presence of links and the 'deathtrap play script pdf' string suggest a lure to malicious content. No scripts were extracted, but the overall structure and link behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/123?utm_term=deathtrap+play+script+pdf In PDF document text
    • https://site-1168414.mozfiles.com/files/1168414/28360709330.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389599/normal_5ffccf3f342be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407062/normal_5fb47007b22b8.pdfIn PDF document text
    • https://cdn.sqhk.co/jagugide/bMhhCjb/gejekajesixukikezejosirev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473640/normal_5fe08c71a4268.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490547/normal_5fc28edbb4abd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408319/normal_5ff2886fa0d37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447089/normal_5fbf3e8572059.pdfIn PDF document text
    • https://site-1177005.mozfiles.com/files/1177005/ez_loader_trailer_parts_australia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5fa6d04c0bb9d.pdfIn PDF document text
    • https://site-1177607.mozfiles.com/files/1177607/webtoon_tower_of_god_season_2_sub_indo.pdfIn PDF document text
    • https://site-1173528.mozfiles.com/files/1173528/bexobolutow.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/hhiaAgf/wimumigadonalo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418985/normal_5f9b21059b1f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469837/normal_5fe939aed815d.pdfIn PDF document text
    • https://site-1166701.mozfiles.com/files/1166701/37275667933.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_off00013927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13927 5344 bytes
SHA-256: d6341ff637d331cd48d951dfa84347c29337fd21842d8e8eea9044362b33f9f0
font_01_sfnt_off00014b5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B5F 11364 bytes
SHA-256: 43489b285443ffe12711f0373e81c347e83ed7e894572862c47f63ea655b93ca

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