Malicious PDF — malware analysis report

Static analysis result for SHA-256 845ea4a8dc67c80a…

MALICIOUS

PDF

69.1 KB Created: 2021-01-06 11:44:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e65b61d27cbf876282cc3184941e1eb7 SHA-1: e23da62d794a941b767731a5afe36ed59dfc1dcb SHA-256: 845ea4a8dc67c80af5b9bed5e4dced8e84500b807c92ce6b720dce3d1db57c94
174 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. The 'SE_ENABLE_LURE' heuristic indicates the document likely attempts to trick the user into enabling content, a common tactic for malware droppers. The embedded URL 'https://gettraff.ru/aws?utm_term=creating+word+templates+in+sharepoint' is identified as a malicious redirector, suggesting it leads to a further stage of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://gettraff.ru/aws?utm_term=creating+word+templates+in+sharepoint In PDF document text
    • https://cdn.sqhk.co/vumivatuvi/haJhedO/39549521157.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460678/normal_5fba0f897fe10.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/1ce7191f-3c26-4989-872d-40b59c186cd5/alinsky_rules_for_radicals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b040d391-157a-4f6d-afb9-28b988934669/livros_sobre_maonaria_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1b7f9ae-098f-485a-9f36-70bf55c6b8e8/tabamikebu.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/93201797597.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/38457108766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fc9197f-ace9-4e7a-a520-86e0c072bbd2/little_mermaid_medley_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce6276fa-0732-43cd-bc3e-aecd6f17868b/towavumipinisolofemoxud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebbb17ed-e6b7-41d0-a7e5-0448f12079f8/48915201511.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_off0000cfd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD0 5368 bytes
SHA-256: 24379ec18129ad3f42dd28900769883efc6a17e86468b6b2905b0c7858a70775
font_01_sfnt_off0000e1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F1 10788 bytes
SHA-256: ed15e5f848a2e59ccdd53f11fbf1207849456f6cd724e4225c0df14938489c76

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