Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d6c7999a07770e…

MALICIOUS

PDF

60.8 KB Created: 2020-11-22 21:10:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 55bd0624ba9eaef9a479a2964a29c041 SHA-1: 116f743fa99b665760a071f580ec81a8975b1641 SHA-256: 67d6c7999a07770e7e5e21e6e0e92e7b92a89573f842350992ff73660b3a01f6
156 Risk Score

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 0.9996

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://traffking.ru/123?utm_term=best+pve+weapons+destiny+2+reddit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370073/normal_5f9531d5f0f6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487191/normal_5fb8131c3f1c6.pdfIn PDF document text
    • https://lanasasaf.weebly.com/uploads/1/3/0/8/130815311/4287755.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/gelawiweza/marc_jacobs_rain_boots_with_heel.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/klein_isd_net.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/knife_assassination_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/jemunojujopoxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f05b2144-4673-47dd-9977-5400c3e307b6/didatowovokanikapu.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/elemental_workshop_osrs.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/stell_middle_school_fight.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/android_9._1_mobile_phones.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_off0000b244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB244 5356 bytes
SHA-256: e3ab0aace3b4c658f0fd30a5229f8c66fee6c26bad65fdb84e1d9e4f989afb86
font_01_sfnt_off0000c4a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A8 9996 bytes
SHA-256: 97971f6277fc8513db579f9c33f7df74daf5935caf4708f89e9dc3604af4c056