Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5e9d15ad2f8b760…

MALICIOUS

PDF

80.6 KB Created: 2020-12-24 23:45:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 11c43c57dfd2c0e26fa018a97990c4be SHA-1: ee5e9f95082ab66dcee06b05c9b78ab62eb055e1 SHA-256: b5e9d15ad2f8b7604b5f0fccf210f6a01ca47452622a539b133a489e14739221
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated, suggesting a link farm or SEO poisoning tactic. One prominent URL, 'https://traffnew.ru/strik?utm_term=craftsman+lawn+mower+parts', is directly embedded and likely serves as the primary lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/strik?utm_term=craftsman+lawn+mower+parts PDF link annotation
    • https://cdn.sqhk.co/wazuvegox/FgdA3LV/71608620508.pdfIn PDF document text
    • https://cdn.sqhk.co/numanazolov/hiVjajg/fafogulupulirixevep.pdfIn PDF document text
    • https://nabolonoroxene.weebly.com/uploads/1/3/4/3/134373159/5870197.pdfIn PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/7f35bf32dd3468.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb0e6328-848d-4961-a3dc-841084b68729/davusasaroxaguvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35e7fd70-d1fd-4c09-b38c-a85186d0b178/84055697919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68da284e-37f5-4878-8c3a-6d9fab9fcda5/kopuvigojazeladimuxixok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d752f7db-b29f-4000-b335-928c3a76e051/kigabag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19b18b4e-ef56-4f06-a882-cf5e247d0451/the_story_of_o_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b77450b-2784-41f1-b052-fcd382f28285/nesivanitudipawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edf8fab6-1cd9-4105-9fc5-37e7d18b2646/womaxivififofozawidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6b1a60b-b097-49d3-9925-b0c5435ffd4f/m500a1_shotgun_operator_training_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76a970ba-2a6b-4add-b772-d7f54be6dee6/36364942683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6520b64-3025-4b33-a4ed-d0b1dbfc935c/95402153462.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE93 5044 bytes
SHA-256: 8568e016e678933c79109383f8d887d650b4b7bab677cb8d9bd144c6638d46f0
font_01_sfnt_off00010fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB6 11268 bytes
SHA-256: be23e9960dec636ab268f21b58864b44c58a4b3c32cfd2ce3aaf2c060310d1f6

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