Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ef37610d93f939…

MALICIOUS

PDF

71.8 KB Created: 2020-12-27 19:16:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4f2bf420e00166fd831e211576b49c47 SHA-1: 43c77b51ac544e94a9147fe9ddcf5f8c92e9de39 SHA-256: 24ef37610d93f939d34fcf7000ace8e31a8ca8d2e622890bd10a4714a0ed7d0d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, suggesting a link farm or phishing attempt. The primary URL, 'https://trafffe.ru/wb?keyword=yellow%20shop%20vac%20filter%20home%20depot', appears to be a lure to a malicious site. No scripts were extracted, but the PDF structure and numerous external links indicate a malicious intent to redirect users.

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://trafffe.ru/wb?keyword=yellow%20shop%20vac%20filter%20home%20depot PDF link annotation
    • https://cdn.sqhk.co/mepetiruzi/fy3rUhh/archery_games_shooting_balloons.pdfIn PDF document text
    • https://cdn.sqhk.co/denobafopum/giijial/perodidosaxisezavidodo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366362/normal_5f872b8956ab6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402932/normal_5fb692a4ecf21.pdfIn PDF document text
    • https://cdn.sqhk.co/gagufatemo/haiahb8/talking_angela_games_online_play.pdfIn PDF document text
    • https://xabomipa.weebly.com/uploads/1/3/4/4/134484571/bikavik.pdfIn PDF document text
    • https://cdn.sqhk.co/vakiduju/2hbxjjm/79757181550.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410441/normal_5fe23f6cd0321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410190/normal_5fbca1dbc9ad1.pdfIn PDF document text
    • https://cdn.sqhk.co/mozedizupi/jOonGib/zonetizirikidat.pdfIn PDF document text
    • https://cdn.sqhk.co/bafebolabefo/ZVDPjis/plane_control_surfaces.pdfIn PDF document text
    • https://kitedagipan.weebly.com/uploads/1/3/4/8/134892955/bujoxoxovebaluwin.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/wemazun/puwaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd2c936c-087f-420a-af6e-cad125175abf/patam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8262febc-7719-4d84-a42d-fe11f91f4668/fuputidun.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/wizard101_darkmoor_gear_guide.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_off0000d8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BB 5508 bytes
SHA-256: 4fc0624c83558e3b0da077a2a65de78d188a50b7219f809ef270ee987299257f
font_01_sfnt_off0000eb64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB64 11592 bytes
SHA-256: fcd7e0e8d864ae43c226bc465d102fe2ad1414b1624c542974f5644bc3b56f24

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