Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d6047ea6c34e0f…

MALICIOUS

PDF

81.7 KB Created: 2021-04-29 09:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f88c923a6d1d2012a711da2492247b9 SHA-1: 95c3e24df9a7fddf5b5528451a198305079d7332 SHA-256: c5d6047ea6c34e0f5f1a8699727d9c9ac9567d98a0cd8f156a591259033b36b5
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI heuristic suggest an attempt to exploit user interaction for malicious purposes, potentially via embedded JavaScript.

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://jumiwimov.ru/strik?utm_term=brother+tn-630+wireless+setup
    • https://genaseturatu.weebly.com/uploads/1/3/4/6/134615139/4840637.pdf
    • http://kittyplay.online/reasons_students_should_not_wear_school_uniformszrcez.pdf
    • http://usejus.club/zoforamiycujx.pdf
    • https://static.s123-cdn-static.com/uploads/4483082/normal_5fde55144225c.pdf
    • http://koreanluxe.com/94012696553df6ez.pdf
    • https://cdn-cms.f-static.net/uploads/4486197/normal_6014680c4f660.pdf
    • http://de-bewertung-id2842384.icu/sujuwexipqxs5n.pdf
    • http://mon-fortuneo.best/composition_of_transformations_worksheet_answer_keyac4nk.pdf
    • http://sallehq.xyz/how_much_does_mcdonalds_pay_in_arizonamvb4i.pdf
    • https://static.s123-cdn-static.com/uploads/4365608/normal_5fde3d1e124e3.pdf
    • https://cdn-cms.f-static.net/uploads/4462727/normal_602d89f2a4664.pdf
    • https://static.s123-cdn-static.com/uploads/4461204/normal_5fcc41e548f74.pdf
    • https://cdn-cms.f-static.net/uploads/4415052/normal_60305244329d4.pdf
    • https://cdn-cms.f-static.net/uploads/4413017/normal_6050f89933f08.pdf
    • https://cdn-cms.f-static.net/uploads/4384851/normal_604bc011d08b1.pdf
    • https://cdn-cms.f-static.net/uploads/4391899/normal_5fd9476045f1f.pdf
    • https://wofovado.weebly.com/uploads/1/3/1/8/131871653/a3cd6bb568c3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zurovajij/hunter_fan_remote_control_transmitter_uc7848t_with_wall_holder.pdf
    • https://s3.amazonaws.com/widiku/75750185798.pdf
    • https://s3.amazonaws.com/kovozenamofox/injustice_gods_among_us_pc_direct.pdf
    • https://s3.amazonaws.com/padosumifubobo/bootstrap_landing_page_html_template.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_off00010111.bin
37bff8050dbd639ff5365067ada427b5d7cb8b83b2a98331112d4f7c1a7ed833
pdf-font-stream PDF embedded font (sfnt) at offset 0x10111 5332 bytes
font_01_sfnt_off00011345.bin
a3a71f7ed93c02cb43ece407d44774d6ac3c8651fe2e2e656300f00f4b65d787
pdf-font-stream PDF embedded font (sfnt) at offset 0x11345 11212 bytes