Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa437b9eb0a6c515…

MALICIOUS

PDF

66.7 KB Created: 2020-12-21 04:22:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d8893f6dce724d1a2cb24b87d41179b0 SHA-1: 9da3912c27a7e4e1d55fc350d412563feaea8573 SHA-256: fa437b9eb0a6c515cffb76a17c533004a405751f58019d35d4f3c4f3d0619764
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, with one prominent URL leading to a purported game download. This suggests a phishing or scam attempt to trick users into visiting malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafftec.ru/strik?utm_term=beast+quest+ps4+game+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411511/normal_5f9d0f23dc135.pdfIn PDF document text
    • https://zofigaxukinepir.weebly.com/uploads/1/3/4/2/134235574/7cefcbfb8f7af.pdfIn PDF document text
    • https://vosasavowaje.weebly.com/uploads/1/3/4/5/134587316/717955.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/pegek/bass_booster_pro_apk_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/old_landline_phone_ringtone_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/757e2cad-484c-47e5-8b89-d9d28a85fc01/americana_dishwasher_magnet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99238452-fd9b-4e78-80a8-b481fcff1436/sivisibetizelizixebolag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71a1ad82-c7aa-42b2-85bc-f7b6681f22ff/arrl_license_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b324687c-c19a-4b0d-900b-bab0383eba29/sony_vegas_13_crack_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdea7f851e6b539731cab78/t/5fdeab76a478394ebca82e35/1608428409077/agri_fab_broadcast_spreader_manual.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_off0000c85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85F 5540 bytes
SHA-256: 6c6f709a484addf936567038fc4cef052410dcf44cdc4c22021540cc1bbbabb7
font_01_sfnt_off0000db3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3F 10376 bytes
SHA-256: 1053d884083ddd25194894a3bc48b37b34f0282138ed91ee8a5953dbd5359f74

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