Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee9193d2109b26f…

MALICIOUS

PDF

66.7 KB Created: 2020-11-18 20:30:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8002af69398695a842974874d0abea8e SHA-1: 2454ed59c1dab8b5b2140fbe3de7b3ade1f7c856 SHA-256: 4ee9193d2109b26f83ead88f356b66f158854af40440443356f4d560cc7743c0
156 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/strik?utm_term=anatomy+and+physiology+study+guide+chapter+6 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424991/normal_5fa180f0eb7cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417543/normal_5f9532529fdc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461207/normal_5fa2f31cde1eb.pdfIn PDF document text
    • https://zufuxanibagi.weebly.com/uploads/1/3/4/5/134586570/vigiloli-tebunelirokaz-bipodo-xemed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374013/normal_5fa7ccd63fa16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5f99145b4c5c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413468/normal_5fae5290ee005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380859/normal_5f92e2dfc3727.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474998/normal_5faebc966e9ed.pdfIn PDF document text
    • https://dosedupuwosiwoz.weebly.com/uploads/1/3/0/7/130776272/c47dee160d08ec8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377379/normal_5fa7451f080df.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bezorito/nexen_roadian_at_pro_ra8_review.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/suwawomitogukomiku.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/high_temp_glue_gun_sticks.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

Related samples 5

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9AC 5732 bytes
SHA-256: 0b3c0a506bd1be43e0c63014a0e6b4f56a55193ade55928ec511ebadbef476d0
font_01_sfnt_off0000dd0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0D 9556 bytes
SHA-256: bd95f4ab27ffd3003e1619e9211b0c9cd94cc49d631e61cbf610a86006c5478e

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