Malicious PDF — malware analysis report

Static analysis result for SHA-256 53b737941a272656…

MALICIOUS

PDF

79.6 KB Created: 2021-02-28 21:39:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c8429f60b4232a8420ced65f3ae3ecb SHA-1: d0ed7d7a2327e6491094a0f94eb904cbefbb639d SHA-256: 53b737941a272656455e5de0d69cc35562c0c9658155a94794965a1ff120e0b8
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content.

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://xezojetit.ru/123?utm_term=can+something+immortal+be+killed
    • http://francobusiness.com/aliexpress_not_loading_properly39689.pdf
    • https://cdn.sqhk.co/benanejufa/RjgViug/18967619285.pdf
    • https://cdn.sqhk.co/tononapiwaso/gygfdRV/10073610603.pdf
    • https://cdn.sqhk.co/tisewesir/giXjegj/jaxisezeranelelitute.pdf
    • https://static.s123-cdn-static.com/uploads/4447647/normal_6003254788a6e.pdf
    • http://ketousa.site/adding_integers_with_the_same_signnqlle.pdf
    • https://cdn-cms.f-static.net/uploads/4380219/normal_601a6cc9c7b9d.pdf
    • https://cdn.sqhk.co/surikuzezun/gGi4Nit/13761668371.pdf
    • http://fuvesozufinefi.medianewsonline.com/what_is_the_symbol_for_the_nasdaq_100_index.pdf
    • http://rat-red.space/77834802834bxul5.pdf
    • https://cdn.sqhk.co/menigopas/oififgf/90879846350.pdf
    • https://cdn.sqhk.co/giganopof/Jgiqhft/atomic_bomber_full.pdf
    • https://cdn-cms.f-static.net/uploads/4479938/normal_5fdac52b921ed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dakebesuvum/85298919640.pdf
    • https://s3.amazonaws.com/jupevuxirapi/appendix_in_report_pictures.pdf
    • https://s3.amazonaws.com/tidigudetefumof/best_resume_templates_2018_canada.pdf
    • http://zesafemumibow.myartsonline.com/hbo_fire_and_blood_release_date.pdf
    • 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_off0000faf4.bin
25f37ee039fc9ea0884418780e0f2d222f1bcf7fabd424f9b148238cb31e6932		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF4 5348 bytes
font_01_sfnt_off00010cee.bin
9fd5d7be47bcbeb336b19a83dac2d97506f8a2f8ab511063e9a76fa3ed4b9193		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEE 10148 bytes

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