Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3bb3ebaa0af2089…

MALICIOUS

PDF

68.5 KB Created: 2020-11-16 16:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e7e7eba47215fadfce5b10ea38abd6b2 SHA-1: b69e55e2abea7ec84bf975748070b273f44471b8 SHA-256: e3bb3ebaa0af2089f233876dfd3631259c92519e6c1133770c3ec6b9d20ab5ce
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it is malicious, including ML classification and ClamAV detection. Notably, it employs a 'Clipboard command execution lure,' instructing the user to copy and paste content into a shell, which is a common social engineering tactic to trick users into running commands. The embedded URL likely serves as a download or redirection point for a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/strik?utm_term=beini+1.2.5+iso+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367275/normal_5f97b1f345eab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_5f8733a4a6d3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453328/normal_5fa644bbdb55f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387219/normal_5fab2d91f2de7.pdfIn PDF document text
    • https://nogulumu.weebly.com/uploads/1/3/4/4/134476008/7127911.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/276881af-fb94-4479-abff-7ba30b57943b/vebusovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb5c4eb4-e55a-4cf9-8493-b58504cd89fe/history_of_walmart_company.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f11ba73a-d206-4e10-8048-f41111b82040/lazisekezozox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38356fd7-2867-423f-b098-7413f4f504e1/98626204600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d7cd91e-aab7-4675-92a4-6c2b4d29ae81/futefemis.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/where_is_the_nearest_super_walmart_to_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a36e5744-bb3e-41f3-ab9a-892efe9e9511/guitar_hero_guitars_for_pc.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB1 5204 bytes
SHA-256: 22c6d790c33ecf3fac8a7f6457fae70d32f02f7d6e1906a511f212835fead92f
font_01_sfnt_off0000dda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA0 12080 bytes
SHA-256: 9e88865f81ebdd8f12495ad99c6e45b950483cd0dea7dc05110650d1031b0172

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