Malicious PDF — malware analysis report

Static analysis result for SHA-256 71ad6eee9f4b7171…

MALICIOUS

PDF

69.2 KB Created: 2020-12-03 18:00:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a9c0c568ca414f0f0c743764d8fbb869 SHA-1: db32f9bfeaf5e13f2209bcd4850091e0199692e2 SHA-256: 71ad6eee9f4b7171194d7a236dd42260a9ed355e9d60cc9971dfc1aec358a513
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffmen.ru/aws?utm_term=adivasi+video+song+2019+dj++mp4 In PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/420ce.pdfIn PDF document text
    • https://pobezewimo.weebly.com/uploads/1/3/2/6/132681951/duguweleda.pdfIn PDF document text
    • https://kuxifegofemiza.weebly.com/uploads/1/3/4/8/134865321/1989f4f5.pdfIn PDF document text
    • https://ziwavolenexajid.weebly.com/uploads/1/3/4/5/134503628/4009525.pdfIn PDF document text
    • https://vepimogarib.weebly.com/uploads/1/3/4/8/134856589/gifivav.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/5fc0ca7740f1034a5ca83b63/t/5fc12a01645712565465704f/1606494727816/78380057804.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e110403f5353fd95a22f/t/5fc81f4a8eecd53e39dda2cd/1606950730877/96056171040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c5d1f4e-2fb6-4307-b4f9-182d860c1b45/caractersticas_generales_de_las_estrategias_didcticas.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79f4904a8c57c148b6805/t/5fc8845113de6e79815cc8ee/1606976594511/samsung_pay_card_curve.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ed17f7cf8c75402b0ccf/t/5fc10bf21972c46e3cc3817a/1606487026715/tozesakifawetetuj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf609fcb3e0f5771471c90/1606377656837/tenafene.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_off0000cdcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCD 5844 bytes
SHA-256: 31d5e5ea7ce66d1719e69439320d98fd1dd22f36907b5380d87577f98fe566c8
font_01_sfnt_off0000e1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B4 11660 bytes
SHA-256: 94ff4b46f9940c19bc656c10e30f6e353850e0bb6d277e13e01370eab7ecf8dd

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