Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dce3b9ea8a54b79…

MALICIOUS

PDF

91.4 KB Created: 2020-12-23 20:03:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 22a5c8a6fac7c1cba641c5150bb8b394 SHA-1: d5dc506308f3c9ec68202e3e7a86e33861252abb SHA-256: 0dce3b9ea8a54b79a095c39aa70426a069ff11a44eb83fc75af9ac0dc1562d78
184 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'bowling christmas party ideas', suggesting a phishing or scam attempt. The presence of multiple links on disposable hosting further supports a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/strik?utm_term=bowling+christmas+party+ideas In PDF document text
    • https://rarikomedos.weebly.com/uploads/1/3/4/6/134616559/4000696.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404524/normal_5fa3c0c924d10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492529/normal_5fcd65c17239e.pdfIn PDF document text
    • https://cdn.sqhk.co/jebixusugak/ggibhij/5k_to_10k_app_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451355/normal_5fbe7fa7a1d72.pdfIn PDF document text
    • https://dapevorejux.weebly.com/uploads/1/3/4/6/134695165/218c3e11.pdfIn PDF document text
    • https://gekeforoka.weebly.com/uploads/1/3/1/4/131438206/e6658eae16.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/72dbcd65-feae-4f90-8a29-b4754278d850/22454685283.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/jonozejopaboxof.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/nofutawesifodolinedodewib.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/tamap.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_off000127bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127BF 5732 bytes
SHA-256: 4b705e577d9f0c937ffca7b28aa906a2054d4ffe7dd88da889bf0c3bc83d8360
font_01_sfnt_off00013b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B2D 11160 bytes
SHA-256: 7f7188fcf4f70457c8d9b9c12e5a138120ef2f97537b5cfa0694974decb1660a

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