Malicious PDF — malware analysis report

Static analysis result for SHA-256 17fed68f2e84b730…

MALICIOUS

PDF

84.5 KB Created: 2020-11-25 12:12:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c043a005d038a050bc5068c6ccc504e SHA-1: d3c51c8b76df314624f43aba0855ca8d1c5b1f6d SHA-256: 17fed68f2e84b73026ed01aa1e1c80c0b0ec81a1872c1df2cad6386106ee9d8d
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of embedded links, including one pointing to a known malicious redirector, suggesting an attempt to lead users to harmful websites. The presence of a link farm indicates a potential SEO poisoning or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffmen.ru/123?utm_term=80%252F20+running+plan+pdf
    • https://cdn-cms.f-static.net/uploads/4368246/normal_5f91e8096921c.pdf
    • https://kivuligob.weebly.com/uploads/1/3/0/8/130874143/9208696.pdf
    • https://nuzopotox.weebly.com/uploads/1/3/4/4/134497293/maseti.pdf
    • https://cdn-cms.f-static.net/uploads/4369504/normal_5f893a6e6a73b.pdf
    • https://tiposowa.weebly.com/uploads/1/3/1/1/131164246/gotunujapow_jevirefinozig_tedotejifa_zaxazaliwasin.pdf
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/fd4fb9b097.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zetare/5449065895.pdf
    • https://s3.amazonaws.com/tetazino/93163846802.pdf
    • https://s3.amazonaws.com/julaxel/lunsers_scoring_sheet.pdf
    • https://uploads.strikinglycdn.com/files/f85fa1a2-fd59-4b9e-be28-95ffd4682188/roland_tr_707_manual.pdf
    • https://s3.amazonaws.com/fupanabivote/53871274905.pdf
    • https://s3.amazonaws.com/sakaburepagase/gail_vaz-oxlade_jars.pdf
    • https://s3.amazonaws.com/nosepevozux/website_templates_code.pdf
    • https://uploads.strikinglycdn.com/files/32de488e-e8ce-4ee2-b6ab-89322e1a041d/conte_des_origines_cm2.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_off00010b39.bin
9076e3efc92e469a55864dc58578a27b4fa9b08625b8e6a17308d200fcb2d7a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B39 5440 bytes
font_01_sfnt_off00011dd0.bin
61df9ef4b524e9785024c5589333b1889b661edca105dbbe95590ed06e89f9ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD0 11540 bytes