Malicious PDF — malware analysis report

Static analysis result for SHA-256 13776aceaa532420…

MALICIOUS

PDF

58.6 KB Created: 2020-12-16 05:14:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d3fe125d8ecf1f4c208d07417d74953b SHA-1: b9459d53420940eeb558e948f64a27e7dbfff700 SHA-256: 13776aceaa532420d6963846e1770512d59b33f3b924db75ff577178d92d78c3
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links pointing to a known malicious redirector URL, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious links indicates an attempt to lure the user to a harmful site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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/strik?utm_term=st+james+millstadt+facebook In PDF document text
    • https://static.s123-cdn-static.com/uploads/4488316/normal_5fca793137602.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377662/normal_5f8fb9be01dc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_5f87096ef29b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_5fa84ff62dce7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467915/normal_5fd13b41db811.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385204/normal_5f9dc9cdbabe1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc14f18d26ff1194f767c31/t/5fc5d2b54e98326c02daf6fa/1606800053360/nodemojotazatil.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1651bc89e1c4b8fc1e357/t/5fcec9fd5c8977691e2948d0/1607387647355/primal_legends_hack_tool.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2aebbb8467722f1dfa14b/t/5fc6cb4ebfb90028be3cb66d/1606863696882/can_exercise_make_your_voice_deeper.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6a0bbf7cf8c754052888c/t/5fcffa106742965a9ded5abd/1607465489771/fury_road_guitar_guy_song.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc583dfa879396864276626/t/5fcd23786f0099009e6b9867/1607279481194/3d_animation_snake_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5124646-bc3a-48b8-a21f-bd0a7dc7f43e/34844465754.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_off0000aa1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA1A 5456 bytes
SHA-256: 8f1c9556ba8b13d3e7a4b783d46fcf02449c67f67a269b5fb60c761c4360818f
font_01_sfnt_off0000bc9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC9D 10104 bytes
SHA-256: 6144c1d89e5bb8e0fcf012c4d560050cfe8bbb6c24512f40f8738190a2b31048

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