Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec41945c8d3d1372…

MALICIOUS

PDF

68.5 KB Created: 2021-01-01 21:47:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a673494f6da367d021711d9bcfb85b77 SHA-1: bd1b0c0216ea1d5ac5123b842b6cc21557234c82 SHA-256: ec41945c8d3d137238401ba0530a5a678e4dabf651b032c7de180a7db36cca7e
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a domain that appears to be used for phishing or malware distribution, disguised with a search term for a popular gaming accessory. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=gamestop+ps4+controller+charger PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449627/normal_5fa3c42545573.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5fd18ae777c62.pdfIn PDF document text
    • https://cdn.sqhk.co/zoboxoba/ejgshef/my_coaching_app_free_for_teachers_teach_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369162/normal_5f8865dfb2549.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/ibgiBOE/zewuzojopiwugomawexolukes.pdfIn PDF document text
    • https://cdn.sqhk.co/dalogunutixo/Xcfihda/red_sun_tattoo_meaning_korean.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380237/normal_5f8fe73617f93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_5fbd5a6100996.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496816/normal_5fbbd9161573d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418170/normal_5fdfd84803c18.pdfIn PDF document text
    • https://cdn.sqhk.co/monasomeb/jiaicge/faxagibus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465559/normal_5fad739423f18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389582/normal_5f95e104ed01b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA1 5468 bytes
SHA-256: ac8ec9ffdfd46f92f98997f4296bd4411460e8eeccbbf26ed5588aea759f0a06
font_01_sfnt_off0000e11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11A 10660 bytes
SHA-256: 92938df164495db81255a9f19904aea8b809e75bb2a2fb9d8b4fcb45a8ce7ae8

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