Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd461e8ec686a808…

MALICIOUS

PDF

73.3 KB Created: 2021-05-31 23:40:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0e835a4f28a27ae78d6e681a9ad8bb4a SHA-1: cee79ae948260be570d68a7cb4d1419caaf5cd03 SHA-256: fd461e8ec686a808f0e1dbb533a2a0f3ae1ca6495c12473ba71ce7b0a63b8491
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, masquerading as a game template. This URL is likely intended to lead the user to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://smidgel.ru/pbw?utm_term=free+printable+horse+race+game+board+template PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4406782/normal_60095ea0e3855.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390381/normal_5fe52ee374235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486963/normal_600ad6055ffd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426810/normal_5fc5ed892810a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386363/normal_601f3988a61e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_6023cfb068d14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464852/normal_604f65cc7186a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372355/normal_6019fa72eb473.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367275/normal_5fece7809c1c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496014/normal_5fd35852ecfd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418197/normal_6041cb76afeef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373769/normal_60087c627a617.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426677/normal_6055a40c06821.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494432/normal_5fd162244ad1a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sepaxebi.pbworks.com/w/file/fetch/144413199/nusibevudodebuxetoli.pdfIn PDF document text
    • http://bovojigu.pbworks.com/f/how_to_set_a_sharp_alarm_clock_model_spc_844.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/f/josepadekanawuxuzamigewi.pdfIn PDF document text
    • http://dekokos.pbworks.com/w/file/fetch/144416838/zudarilotunaketa.pdfIn PDF document text
    • http://sonopewobu.pbworks.com/f/nixibug.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_off0000e0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C1 5580 bytes
SHA-256: 4668889f34510aad5b4891d075cf428e0191af2382d58936aa16a126dc119dc5
font_01_sfnt_off0000f381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF381 10564 bytes
SHA-256: 53cdae77539f2af971b0f342f39c1bc3113ac1af1eca67c9ad50af20b75871f0

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