Malicious PDF — malware analysis report

Static analysis result for SHA-256 c36a8584da425d7d…

MALICIOUS

PDF

80.0 KB Created: 2021-03-31 14:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f2eb780c0b75970f3de051dd7c11d5c SHA-1: c50209464960fb046d09cf352a2c1b2bc5b97d07 SHA-256: c36a8584da425d7d6b841fc7bd20af43c79cb812a7ad3a487dde9d7acbe62cf7
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 purposes. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest an attempt to lead the user to a malicious site, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=what+is+a+functional+analysis+in+business
    • https://cdn.sqhk.co/pibepufas/olQ6gdB/storage_wars_online_bidding.pdf
    • https://static.s123-cdn-static.com/uploads/4447877/normal_5fe2977bad5f3.pdf
    • http://vufiwopader.medianewsonline.com/enga_karuppasamy_song_lyrics.pdf
    • http://luzupogakij.sportsontheweb.net/poteboku.pdf
    • https://static.s123-cdn-static.com/uploads/4367279/normal_5fc95173b7447.pdf
    • https://static.s123-cdn-static.com/uploads/4373757/normal_5fccd91dd6fbe.pdf
    • https://cdn-cms.f-static.net/uploads/4370074/normal_6028bd8cc8db5.pdf
    • https://cdn.sqhk.co/sawitofi/LFrjejc/58828362716.pdf
    • http://jefijunanupe.sportsontheweb.net/51732051542.pdf
    • https://static.s123-cdn-static.com/uploads/4409258/normal_5feb58f7b480a.pdf
    • https://cdn-cms.f-static.net/uploads/4379974/normal_603778954abce.pdf
    • https://cdn-cms.f-static.net/uploads/4477892/normal_601f723de7f7b.pdf
    • http://mebevevi.mywebcommunity.org/microbiology_lab_equipment.pdf
    • https://cdn-cms.f-static.net/uploads/4465000/normal_603e88bb0d50f.pdf
    • https://cdn.sqhk.co/zonakagud/higgusK/62472807176.pdf
    • https://static.s123-cdn-static.com/uploads/4468296/normal_5fe2222e54fae.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pazerogasarinu/scallop_report_crystal_river.pdf
    • https://uploads.strikinglycdn.com/files/2297abe2-fc32-413d-ab59-35d5cf384191/binebog.pdf
    • https://s3.amazonaws.com/tuxutedi/guided_tours_of_italy_spain_and_france.pdf
    • https://uploads.strikinglycdn.com/files/36aa923e-3ba6-4be4-ac35-4c77cbb77ad2/fufozobedizimulum.pdf
    • https://uploads.strikinglycdn.com/files/4ec5f407-e9df-4a47-97d3-b231c27295ab/bezufimumutagimiranif.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_off0000fd1a.bin
61340708b9a75c0229c0860018cbd263dcd0854b15d2cf473e10e2799d2d8d1d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1A 5128 bytes
font_01_sfnt_off00010ea5.bin
a40d56081e23ae7c220512abd8253d9804b45e2ec7a127d2d57aa21766928c98
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA5 10552 bytes