Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f18e99dcf8fb158…

MALICIOUS

PDF

71.8 KB Created: 2021-01-06 10:36:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdc0a7a438ba61918097f0190fdbd394 SHA-1: e772b4d721e27fbda887deda8e7dd0936157c785 SHA-256: 8f18e99dcf8fb158cbdda04d0a8e2e4d170807401ec93cb956b5bce1454cacab
154 Risk Score

Malware Insights

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

The file is a PDF that contains a malicious redirector link. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL, https://ggtraff.ru/123?utm_term=the+cult+you%2527re+in+lasn, is flagged as a known malicious redirector, suggesting the document is designed to lure users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=the+cult+you%2527re+in+lasn
    • https://static.s123-cdn-static.com/uploads/4367275/normal_5feb4039ab83e.pdf
    • https://static.s123-cdn-static.com/uploads/4384045/normal_5fce229e62665.pdf
    • https://cdn.sqhk.co/ketadasogob/Etphgxb/knifeless_tape_3m.pdf
    • https://cdn-cms.f-static.net/uploads/4405413/normal_5f99ded6b3a80.pdf
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5fd8247bea8f1.pdf
    • https://cdn-cms.f-static.net/uploads/4415519/normal_5faf725d3cb61.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/80fdca26-9580-44cf-b99c-2cb86ebbc0d1/senitisojexapoxital.pdf
    • https://s3.amazonaws.com/tipakalif/26922108794.pdf
    • https://uploads.strikinglycdn.com/files/7086fe27-93c5-4afd-87fd-227bcf48692f/kc_undercover_season_1.pdf
    • https://uploads.strikinglycdn.com/files/d19cdf0d-7588-48b2-b968-be685be73a8d/tik_tok_video_apps_chahie.pdf
    • https://s3.amazonaws.com/memul/blast_furnace_slag.pdf
    • https://uploads.strikinglycdn.com/files/0147fbba-a6a2-470e-9050-fb509249e7cc/fusunevumaxa.pdf
    • https://uploads.strikinglycdn.com/files/d9e1b70f-dfc2-4936-a14e-8c6ff1401ea1/29848677228.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc0e.bin
6d5eb03a5abb93392b8b2bd996cc9b752a08cbf2a9f55da93504706c4cd1c2a2
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0E 4972 bytes
font_01_sfnt_off0000ecff.bin
f57b4f4feeb59febd1a5ce0ddd77f31c7d097b88d00c355ebaec1ec772614bdc
pdf-font-stream PDF embedded font (sfnt) at offset 0xECFF 10596 bytes