Malicious PDF — malware analysis report

Static analysis result for SHA-256 4afc537180ab28b6…

MALICIOUS

PDF

70.6 KB Created: 2020-12-17 08:00:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a8a198fee726dbabae5b73209fd983fa SHA-1: 86d350bd580a12fadc190b67281933787f08dc99 SHA-256: 4afc537180ab28b6c62f030d7ef6608499c038c41a13923ce4e91599f59af7d0
104 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to downloading an 'Nfl game operations manual'. The presence of an external URI and the ML classifier's high confidence score indicate a malicious intent to trick the user into downloading further malware.

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
  • 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=nfl+game+operations+manual+download PDF link annotation
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/c434271c207ba0.pdfIn PDF document text
    • https://goxagakile.weebly.com/uploads/1/3/4/3/134316835/najegozaxofonuj_damevudisirik_medadeb.pdfIn PDF document text
    • https://nunigatomupava.weebly.com/uploads/1/3/4/3/134314222/lowigoneruvezepi.pdfIn PDF document text
    • https://fuguweraxawu.weebly.com/uploads/1/3/4/6/134684603/2457652.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc5c2ac8ef7301f8b3249da/t/5fcd199f9aa2de0c6499f8a5/1607276961503/tuwaxilasoxiroratugafi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fceff5d181af13ce2744de0/t/5fd63ba0b1c3f31c7a7c1cb4/1607875490727/answer_traduction_en_franais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/505e79b1-7e62-464d-98d5-17c727a18c5b/17825348052.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48122824-fd69-4254-a86b-a780d6881cf2/la_casa_de_los_dibujos_en_ingles.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc144a93398ff7515307f21/t/5fc59d9a2dd96f5918af093d/1606786459576/fubovetimezunibo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc565e860f2895dc105f20e/t/5fd68ef796ed101a3e47b64a/1607896824379/canva_premium_apk_onhax.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACE 5304 bytes
SHA-256: 6868f90ae74fa669f93c0af8bf8f1015a348eef68ccf8e3d663e4495d3915e84
font_01_sfnt_off0000dcd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD3 10164 bytes
SHA-256: 2030267c275fe1dfb7878448e0c09d342283ebb82bf940573e3a184ca03348a3
font_02_sfnt_off0000ff99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF99 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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