Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1032d11b6c0ae7…

MALICIOUS

PDF

128.0 KB Created: 2021-01-22 16:06:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 402e8a3270c9de6449ea845a8ba20b65 SHA-1: b9ac39a0fa7d98c6a026406513e856279df8a65f SHA-256: ba1032d11b6c0ae7a48b79b6b66084aa3720fa31a4e0448ce242d83420b808b5
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is likely intended to redirect the user to a phishing or malware distribution site. The document body, though partially corrupted, suggests a lure related to head pain, which is a common tactic in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/123?utm_term=partes+de+la+cabeza+que+duelen PDF link annotation
    • https://site-1178186.mozfiles.com/files/1178186/astronest_the_beginning_forum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476578/normal_5fcd8ae398347.pdfIn PDF document text
    • https://site-1176136.mozfiles.com/files/1176136/30382568212.pdfIn PDF document text
    • https://cdn.sqhk.co/vujalenan/0Y8wqij/92872897292.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450733/normal_5fef88669f3a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410433/normal_5fc9d1c8726cc.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/iji72ic/samsung_galaxy_4x.pdfIn PDF document text
    • https://cdn.sqhk.co/disonixures/5iaVykc/powerboat_racing_3d_apk_mod.pdfIn PDF document text
    • https://site-1178004.mozfiles.com/files/1178004/32514277974.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/Hgdhfgd/79440284233.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/bomupi/10015255779.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/ganawulopakizavuf.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/arterial_ulcer_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/pubijesadagepu.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/fejotakajef.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_off0001b966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B966 5248 bytes
SHA-256: 93f4f058cefe6fea58b494b3a9fe2734ee0b68b5ef38bcd61013fd603c58cf20
font_01_sfnt_off0001cb4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB4E 11592 bytes
SHA-256: f8e3dc4fd59f32d1a7cbd1900b74e11cac3d2df883bc4e01fec482ed5789875d

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