Malicious PDF — malware analysis report

Static analysis result for SHA-256 4126c4788eaab526…

MALICIOUS

PDF

84.5 KB Created: 2020-11-22 04:53:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ffa165b74ab089dc39300b1b51185381 SHA-1: 5cdc39950cf0dedc3a0e41e02264dda49c25cff3 SHA-256: 4126c4788eaab5260f006dfbe2225f3790a6a96ef0324a756223c2c1f7228a31
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The embedded content, though heavily obfuscated, appears to be a lure related to popular media to entice clicks. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or delivering a secondary payload.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffking.ru/aws?utm_term=deadpool+2+trailer+music In PDF document text
    • https://cdn-cms.f-static.net/uploads/4485454/normal_5fa7ed772e382.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446635/normal_5fb9a5347ceb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386830/normal_5f8ef3d762368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_5f9b17ece3d8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426557/normal_5faa68ea2260c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492555/normal_5fb9b9cf9169c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5f8958a646334.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/dutimajizowa/34060036216.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/acupressure_points_chart_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/makolixowakixomag.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/ponifawekorav.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/rajivafuruxoriwuwexafe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FB 7216 bytes
SHA-256: 66c6ec698aa1c828a7f1cb4bef82942c7134d59b12370ed0f0614459d868c2b4
font_01_sfnt_off00010c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C93 5348 bytes
SHA-256: ae1bfc4b28baffd27506025e53c0ae6f3d8cb5141fbed2ed28414b4fdd43e1f2
font_02_sfnt_off00011eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB1 11544 bytes
SHA-256: 528e37960da9513a8268bad1a8c38db45229cfec16b6059875b2298cd3076bc1

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