Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe68de00ff32c83…

MALICIOUS

PDF

98.9 KB Created: 2020-11-25 01:08:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a61e0b415d80a02e6322af687e086d40 SHA-1: 90dc38de3d3d104e669577728dc18eb5da118d1d SHA-256: ffe68de00ff32c833c6e72593e9caedf2874bd6e44a8bc17d9dbd0bad0df7a3a
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=class+of+2020+college+scholarships PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467926/normal_5fb544503c54f.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/weduserumuxipiniw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443325/normal_5fa4128442d49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_5f905b1d1b391.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408865/normal_5f93afe7d2c05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414502/normal_5f9c105913cd0.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/ff06dfdf.pdfIn PDF document text
    • https://xogunepole.weebly.com/uploads/1/3/4/5/134529021/9739518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443815/normal_5fa9642568e48.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/xaliwalufoguni/film_avatar_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/76130210329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa2cc236-4154-4a40-88a3-856686702a27/the_amazing_spider-man_2_apk_android_data_mod.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_off00014533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14533 5456 bytes
SHA-256: 6d567a7f78c1e84f94a0f87b9248c2decf5d763b00926d19bdd4bb4c013f6812
font_01_sfnt_off000157ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157BA 11204 bytes
SHA-256: 364e2652ab1f8de03157b7b015bc590e28a0ebb96cb63e7ae39f2b9a4ee971c8