Malicious PDF — malware analysis report

Static analysis result for SHA-256 40f805e3c9996b48…

MALICIOUS

PDF

70.0 KB Created: 2020-11-29 08:19:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e4f0c5de6f7f3639ddbc4ef6429ff982 SHA-1: 91680e0f87a313ab9c88a1552de493b1d5025eaa SHA-256: 40f805e3c9996b4870a21bdb2c3494ab77b5a2e159163335a394c784325ec8f4
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 0.9997

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
  • 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=knifepoint+ridge+glitch PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424331/normal_5fb9c9249c91b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461763/normal_5fbb3e2a5fbb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421341/normal_5fafc0e48964d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390373/normal_5f8fe86d42360.pdfIn PDF document text
    • https://pupedabakonarow.weebly.com/uploads/1/3/4/7/134709410/266b5df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387218/normal_5fa330bacf630.pdfIn PDF document text
    • https://fexatawolev.weebly.com/uploads/1/3/4/4/134445796/ravazivoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5fc033b6f116a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/leributafa/98140415616.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/can_i_play_android_games_on_macbook.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/fancy_pants_2_remix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4c07679-2c51-4ed5-b1ca-b92568bf592d/jovupunokuvesolarujog.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 8

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_off0000c6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F8 4788 bytes
SHA-256: ee0da70769c6ab0f76d86f35e08d3614d196267391cf2c9d7172f6dee1e29281
font_01_sfnt_off0000d72d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72D 10748 bytes
SHA-256: 7fa8bd4e6c617b126ea77525d3ea3e21aedaec5601ffbb4084f569ff3ffc4107
font_02_sfnt_off0000fbd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD6 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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