Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ef116c01e01bcd…

MALICIOUS

PDF

71.9 KB Created: 2020-11-16 20:56:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2d1123921641dc97dc6b8f4ec11c378b SHA-1: 4838fd9cc00ea6a20015429200c94c4828cfa5bb SHA-256: 14ef116c01e01bcdf14820691ca9cc737802508c1c2f5c6ecc76c37a122c03ea
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, disguised as a user manual for an Audi A4. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL is the primary indicator of compromise, likely leading to a phishing or malware download site.

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
  • 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://gettraff.ru/123?utm_term=audi+a4+user+manual+2016 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4445726/normal_5f9f8a8e13967.pdfIn PDF document text
    • https://rijizego.weebly.com/uploads/1/3/0/7/130776487/8577c92dfd8d37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385852/normal_5f982cd85385d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f972a3535c88.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/nibiwer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5f875859b2c22.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/666e3301-56a5-4d2a-a85e-411348b701b4/la_leccion_de_august_capitulo_1_resumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cf3d8a9-b5cc-40bb-9890-06393d2c04ac/handshake_problem_equation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b762ccb3-d487-4299-a3f1-bf264f432f63/fabopudidunape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/781e68a9-de52-4b26-bd68-06feb42c5425/rainbow_six_siege_skidrow.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/gojajisufaxikujumusifaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/64804906531.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fc4755b-2db9-4d6a-b842-20d3a4c26775/vuwinu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/18095950421.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/11734513440.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_off0000c684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC684 5528 bytes
SHA-256: 2cc4bc12f4711f31d7cc30e4da0da0fa53e8d2c77ea3f1b8f6a107d36a31723c
font_01_sfnt_off0000d942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD942 10512 bytes
SHA-256: 660555128e27d7323b2546bed14afd9a152956e7dad2c3a2ccf0cc0b87ad9155
font_02_sfnt_off0000fd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD59 16216 bytes
SHA-256: 0488c9f99e0fcd21ca2988e9d429c6d59fec344e78892dfd70b5e7a88f9c948a

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