Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff22c3b0d6827a92…

MALICIOUS

PDF

77.9 KB Created: 2020-12-16 21:33:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3696b69ccec935729281defe4875f827 SHA-1: 64031ccd9f1aa183caafd1ba3b8ec874e3e4e9e6 SHA-256: ff22c3b0d6827a921a3a46b650f24508c661be870c01c894d5516dd89c542319
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://cctraff.ru/123?utm_term=java+collections+ebook+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372955/normal_5f8a90e36d368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379859/normal_5fa4f2aab646c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379369/normal_5fa17c4807561.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382208/normal_5f8c598cc346d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5fb2bf277ef34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427514/normal_5fa588e5badba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe3d10f81c9a2a0c6e0057/1606302993042/wojalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e275c0bc-d678-492c-9f38-36cf1931cd48/dbpower_dvd_remote_control_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5bc7ddf132613bbdeaa48/t/5fc8ab44a9f67830ca00a76c/1606986565597/fasixutebafomeva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dd3926b-cc47-4f05-bff0-43940a736061/86476466446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/335067d5-1e72-4d72-ab0b-a001407fa9b5/sim_taxi_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/91258278879.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB33 5308 bytes
SHA-256: f58d98f5ca686480f97db44c208c29b801dfea473295e9da04e5171119d0b3ff
font_01_sfnt_off0000ed52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED52 6524 bytes
SHA-256: 20a7a01ffe30c8e9e47dabcde25ce918e087158d1bbaf66c2d7c3651539f3e92
font_02_sfnt_off0000fe75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE75 12964 bytes
SHA-256: 3bebe9590cb000da0f0da9ff5032bafd214f0af7e83e42bca175624cd0f6dc9c

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