Malicious PDF — malware analysis report

Static analysis result for SHA-256 620d0e4cf88acd7d…

MALICIOUS

PDF

66.5 KB Created: 2020-11-17 14:40:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2bb1ddb3bbc7db8f41f53613288f6b99 SHA-1: c957ee2133ed7f9a38dd265affc3fd1de2583f63 SHA-256: 620d0e4cf88acd7ded4543e84678b3522f9420d7969a2cdc4dd48cc1fd414b92
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/strik?utm_term=perspective+drawing+books+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407793/normal_5f9d0b956686f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_5f87586caf7e6.pdfIn PDF document text
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/mefadivafedo.pdfIn PDF document text
    • https://sawonelezaxiso.weebly.com/uploads/1/3/4/5/134588179/c05c201a227e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415936/normal_5f9be3a63babe.pdfIn PDF document text
    • https://mutodebubopuvom.weebly.com/uploads/1/3/4/3/134373551/5354962.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379384/normal_5fae3303664f6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/how_to_draw_drawing_and_sketching_objects_and_environments_from_your_imagination.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/6719785836.pdfIn PDF document text
    • https://s3.amazonaws.com/tifemuma/81982570442.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f748c94-f256-46cf-8664-932fc1d4916d/54101923134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a300a663-ef52-44a1-b1e1-13877e5d7d5f/ralaxupatizejurip.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_off0000c506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC506 5680 bytes
SHA-256: c3968074c60b2dde275393d678ff4dd0a8dab82790801dc107f1c39fbf2a3a41
font_01_sfnt_off0000d87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87E 10936 bytes
SHA-256: 3fb9b8b97cb7947435ef68276a143a03b11fa8dc65703fb01828ece8c8f6a1fb

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