Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c2f0fa918a701bc…

MALICIOUS

PDF

67.0 KB Created: 2021-02-22 21:29:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1846b8b14e17a4c5748fff0c7c08ed8d SHA-1: 7e163ce7fd33fb5ac5e8eaaa443a3545cb1b1494 SHA-256: 4c2f0fa918a701bc6395c335c53ebac8984c91a0c2cc6403ba233bbaf3493931
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URL that is presented as a search result for a specific query, likely to trick the user into clicking it. The URL `https://baarspo.ru/wix?keyword=pick+up+lines+for+long+distance+relationship+tagalog` is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://baarspo.ru/wix?keyword=pick+up+lines+for+long+distance+relationship+tagalog PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469145/normal_5ff95743b89d9.pdfIn PDF document text
    • https://temizugejifo.weebly.com/uploads/1/3/1/3/131384470/bidisavipo-tozovi-witaxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376858/normal_601773570cd29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426812/normal_602f0a4d357b7.pdfIn PDF document text
    • https://cdn.sqhk.co/runudori/hijicam/wokijegarele.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401714/normal_5ff28a977a505.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/pujinit/hasselback_potato_cutting_guide.pdfIn PDF document text
    • http://fomariwidodazum.rf.gd/bosch_tassimo_manual_utilizare.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/porter_cable_dovetail_jig_4210_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/pepurubeme.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_off0000cac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC4 5480 bytes
SHA-256: a731d84ae7c2067992472e9966c38860cfca59abbf9f4e562d2870d417998f61
font_01_sfnt_off0000dd6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6C 9820 bytes
SHA-256: 8e8d678b46c2fd820a1b2845780046e35af1c86b0dc8d6dec15296f6fb303a9b

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