Malicious PDF — malware analysis report

Static analysis result for SHA-256 66298b529614d4ee…

MALICIOUS

PDF

69.5 KB Created: 2020-12-23 00:57:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c156e50da18c33de372e6760409bcdc7 SHA-1: d06628c00b71addaa091b9ba932b6f340dd43629 SHA-256: 66298b529614d4ee5695b5a4086b0698b91fe181a671ca59abd6ae7d2d2d28f4
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains an embedded URL that leads to a suspicious domain, likely intended for phishing or malware distribution. The document body is heavily obfuscated, suggesting an attempt to hide malicious content or evade detection.

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://trafffe.ru/aws?utm_term=lagu+123++gratis+video PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458634/normal_5fa6ba577b27d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5f87358fab76c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481162/normal_5fdf9507a1616.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379846/normal_5fc4ab4f4fc37.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0baa35687f52b6b804624/t/5fc261389b1ed03538292220/1606574392331/toronto_city_hall_wedding.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81e172af-5cc0-49f5-a548-8c5df2f27d42/77267660372.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe00322ff074777c9865bc0/t/5fe08690f23a830a59de7081/1608550033329/piriformis_muscle_spasms.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/oxidative_stress_book_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e80068612547ed5e2b99/t/5fc5da32f3de5e49b5302072/1606801971697/urinalysis_case_studies_with_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd2c3c5b7bc966055df3f1/t/5fde13c58afbbc2717530bbe/1608389574178/mom_calling_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/tisixigiguredafavuni.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cc948139af037644bbed/t/5fcd8659978da30c561570ff/1607304795061/grimvalor_act_2_map.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1d9c2dd96f5918b70302/1606294940825/manual_setting_crock_pot_express.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0052111f6a4198480c96b/t/5fc1f0453f75b1664319afef/1606545478902/megajekokum.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE6 5308 bytes
SHA-256: f5f27536f6dcf85b0e7ff2c638b9762ddf255c6f51ae645f19ca93afa26205d6
font_01_sfnt_off0000cd12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD12 11388 bytes
SHA-256: f61e9f4fb0293a18af66d3b142bea1594a95f901d869015b5ebd1d12ccc47ca7
font_02_sfnt_off0000f394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF394 16464 bytes
SHA-256: 0c59b12e4a99a3399053833eb6ba72a1c8d93f1d3760b005d96e8f90d34e667d

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