Malicious PDF — malware analysis report

Static analysis result for SHA-256 2442f7fd316e9d76…

MALICIOUS

PDF

81.6 KB Created: 2021-03-16 22:24:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13f3b9b63f3c4c2e541000710ddbd421 SHA-1: d35a7bd8980c502160ff6c7018167ee8e9ecd33c SHA-256: 2442f7fd316e9d761da1f71b6584039ddd2fa6a45dc2fec0c435795781156479
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://jumiwimov.ru/strik?utm_term=wedding+anniversary+wishes+for+your+pastor', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'Wedding anniversary wishes for your pastor'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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=wedding+anniversary+wishes+for+your+pastor
    • https://cdn-cms.f-static.net/uploads/4368230/normal_6030140b75101.pdf
    • https://navemozozaju.weebly.com/uploads/1/3/1/1/131164567/daec2ba0b0e0.pdf
    • https://static.s123-cdn-static.com/uploads/4489441/normal_5fe3f42464b2a.pdf
    • https://cdn-cms.f-static.net/uploads/4495042/normal_600f3ad3c3aa6.pdf
    • https://cdn-cms.f-static.net/uploads/4417426/normal_5fd2f85bd2acd.pdf
    • https://vufepuxo.weebly.com/uploads/1/3/4/5/134522835/02dec383f8.pdf
    • http://dusibarupuguli.medianewsonline.com/85312077449.pdf
    • http://gewututikame.getenjoyment.net/8069153932.pdf
    • http://kigadotezolesun.mypressonline.com/act_punctuation_practice.pdf
    • http://winatesef.sportsontheweb.net/rolamekukefegonododudena.pdf
    • https://cdn-cms.f-static.net/uploads/4415964/normal_5fd7d98f30cec.pdf
    • https://wovogivas.weebly.com/uploads/1/3/4/0/134012667/8710789.pdf
    • http://pejokepi.mywebcommunity.org/role_of_genetic_engineering_in_agriculture.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rorokepu.atwebpages.com/barycenter_math.pdf
    • http://fowimifefezujo.myartsonline.com/82942114929.pdf
    • https://uploads.strikinglycdn.com/files/c1c0e692-d673-47d4-acc7-944e516f822c/94817034400.pdf
    • http://viputedijanoxoz.rf.gd/sleeping_bag_tog_rating_guide.pdf
    • https://uploads.strikinglycdn.com/files/c0280e22-60ed-4140-892f-ceb982d258f2/94788802573.pdf
    • http://kimufigekufeta.rf.gd/john_deere_175_hydro_deck_parts.pdf
    • https://uploads.strikinglycdn.com/files/28ebe155-1227-4b87-8ce4-3d162a611cc4/xiwaz.pdf
    • http://pujumek.myartsonline.com/54759319691.pdf
    • https://uploads.strikinglycdn.com/files/a6d36409-88ab-41f8-a304-4a1fab69b241/why_is_my_router_not_working.pdf
    • http://josesomesube.myartsonline.com/begin_the_beguine._partitura.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_off00010130.bin
7a9e2367c00a54e78bcd5a766a46fd3e6ba7df5dfc9b15c26e57a99af65217d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10130 5536 bytes
font_01_sfnt_off0001142a.bin
36568051c9f51a0e96f73bb010d1440225b3179c0619dc8b54fdb28ef4f230ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1142A 11028 bytes

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