Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d73c3addd192c6d…

MALICIOUS

PDF

68.5 KB Created: 2021-03-17 20:48:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 591d99949c9c097a9c0b812891355d1e SHA-1: 4f9c7b1dc8479df66b62e9bb9f63175518c78477 SHA-256: 3d73c3addd192c6dc788c8747d080388714f5951ebef00b4df0a898a460427f1
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/wix?keyword=jack+london+to+build+a+fire+worksheet PDF link annotation
    • http://yourcy.com/782824182898gkk3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448744/normal_5fc7408bbb544.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/Sc1hg9o/leather_pants_zara_man.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446789/normal_601f18f9077d6.pdfIn PDF document text
    • http://sivadozulov.iblogger.org/13110564839.pdfIn PDF document text
    • http://counterman.ru/377627516044nrza.pdfIn PDF document text
    • https://cdn.sqhk.co/leluforeref/pJjenhg/safuta.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/14368346851.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481161/normal_603c4fa0c1602.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415080/normal_5fdebd92cc886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446770/normal_604469b382edb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366366/normal_5ff8282ff2f0e.pdfIn PDF document text
    • http://tuderoba.getenjoyment.net/mopiwubufojopubiwuxi.pdfIn PDF document text
    • http://rewita.fun/29215546062afnr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368240/normal_5fc989b0a561a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382965/normal_602d31ba82886.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sopazanit.rf.gd/hit_and_run_texas_report.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_off0000cd1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1A 5392 bytes
SHA-256: e504497455038b8c220b317e0e34a33c9312c07f3cfb851f1c6d373302887266
font_01_sfnt_off0000df80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF80 10404 bytes
SHA-256: 0952092d41efa21a521d9feb18b4a000ce42744332dc6de4832cd7e4213aa8b3

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