Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cfde53751ff9499…

MALICIOUS

PDF

70.3 KB Created: 2021-03-23 17:33:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c26cf3bef9abed26db9a9aea22c52057 SHA-1: 733ecc44fece7b83c49b76713bb554324b04a4c2 SHA-256: 4cfde53751ff94992200fba995a1732069a825573a7c466a8ad890d82286896c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a malicious domain, disguised with a search query related to audiobooks. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan. The presence of external URIs suggests an attempt to redirect the user to a compromised site for further exploitation.

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://jottigo.ru/wix?keyword=sidemen+book+audiobook+free
    • https://lulipexo.weebly.com/uploads/1/3/5/2/135294167/kipunit.pdf
    • http://spindlndou.space/gluten_free_restaurants_in_indyp0qw5.pdf
    • http://bubble1.space/4874286125hx555.pdf
    • https://rexakutomas.weebly.com/uploads/1/3/0/7/130739652/kifuk_wozekape_memegar_latidoselujunux.pdf
    • http://zitokik.iblogger.org/icici_bank_interview_questions_and_answers_in_hindi.pdf
    • https://cdn-cms.f-static.net/uploads/4368985/normal_603a7a25c551f.pdf
    • http://milanbeachs.space/659827759856l5jh.pdf
    • https://zalinojawovuga.weebly.com/uploads/1/3/4/8/134886974/pixiba.pdf
    • https://vemugalibi.weebly.com/uploads/1/3/4/4/134484787/d0a775734ccae4.pdf
    • https://static.s123-cdn-static.com/uploads/4463552/normal_5ff669555cda3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fawamoru.rf.gd/92258699299.pdf
    • http://zavivemigowoson.epizy.com/guxovi.pdf
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_12719078549b48958f47024c975260e9.pdf?index=true
    • https://s3.amazonaws.com/genukopapovixo/52890347996.pdf
    • https://s3.amazonaws.com/xakapudakadu/assumption_and_constraints_log_template.pdf
    • http://wigexoli.rf.gd/blades_in_the_dark_espaol.pdf
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_b45b1789c51046f79314cb1630a32153.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4ea.bin
0c4c76b0ad11135498f0074e775c00ce7ebf7ecc5b4151760f1d045df83b4053		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EA 5148 bytes
font_01_sfnt_off0000e65c.bin
56917f86bf5dc258b7a655f1d3ad8c44a337a86df7bac226596dd35cf9c09e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE65C 11492 bytes

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