Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eba3b16580143b9…

MALICIOUS

PDF

81.4 KB Created: 2021-02-15 10:52:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: e5c9c82a29d2df8987f24ada1e4eed91 SHA-1: 4f43752eb110c5b0b803b3bfa437beaa443adc35 SHA-256: 3eba3b16580143b9ed9bc1c4690fd5fd3cd6c7b5eaaa0916606eea4541b34905
104 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier, indicating a high likelihood of malicious intent. The presence of a PDF_URI heuristic pointing to 'maypoin.ru' and a 'SE_DOWNLOAD_BUTTON' heuristic suggests a phishing or malware distribution lure. Although the document body is heavily obfuscated, the overall findings point to an attempt to trick the user into downloading a payload.

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://maypoin.ru/wix?keyword=jtg+book+pdf PDF link annotation
    • https://cdn.sqhk.co/bewewojiwo/agdhjha/xudimupibafomozamunumesu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369502/normal_5fdb700c73f90.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/QDghjec/veniritalekisijigefedumo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499635/normal_5ff54536896e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460708/normal_6009945fdb4ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421478/normal_5ff945e4eef37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422638/normal_5fcc4d4d8e704.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389805/normal_6004cb6d5b579.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449771/normal_5ff968f3bc311.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491723/normal_601bd0cc655fd.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/vebisop/konica_bizhub_c368_treiber.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/jitir.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/ketone_body_formation_in_diabetes.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/54421047208.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/kafelupewuxonijetilamam.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_off000102cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CF 4888 bytes
SHA-256: c3409c5f73edfa0873577f91935fa1ea1a885a1d6728a3b59d7a214678e61723
font_01_sfnt_off0001138f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138F 11028 bytes
SHA-256: 0f4d605314f6d8ea34cd750500c272c96aa51b6b7f1aba2d819bea50c35c9b76

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