Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d804fa8c7f5da0e…

MALICIOUS

PDF

66.5 KB Created: 2020-12-14 11:52:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9f0d2ec10755c81344b1f13957cd10b0 SHA-1: 1b4ce84678db49c387bd393c24a81355d9a3e492 SHA-256: 8d804fa8c7f5da0ec366d0ba5d14fd935ff2ca2a92874e430c31d627451b2519
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to a suspicious URL. The ML classifier also flagged the document with high confidence. The embedded URL is likely intended to lead the user to a phishing or malware distribution site, masquerading as search results.

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://cctraff.ru/123?utm_term=perhaps+love+lyrics+placido+domingo In PDF document text
    • https://nivujetomut.weebly.com/uploads/1/3/4/7/134753784/xozejoketebove-kusanakubeditu-pagesovig-gubiter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478933/normal_5fb8ee9b4de96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367941/normal_5f9e0adeebbda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417312/normal_5f955c7ca1173.pdfIn PDF document text
    • https://fopozawiluni.weebly.com/uploads/1/3/4/3/134383369/9827181.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486965/normal_5fd6fad6a684c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387428/normal_5f8d973e311fb.pdfIn PDF document text
    • https://lizatupapej.weebly.com/uploads/1/3/4/4/134401074/jowaxulamevaw-dojobofupo-sosamopev.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/6a221562-c6ab-4c9c-8f8e-d630dc28e3f4/43286672967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fecae101-7a43-4b1e-9aab-3882b52542c8/code_lyoko_william_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ce76ce7-7f0e-49c3-86b1-e0b0cc2d473f/west_springfield_high_school_football_roster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1132ecb5-1b52-4fa8-9079-ce7ae010e9c8/41118185892.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_off0000c6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DE 5652 bytes
SHA-256: e709b874b182b949bd79cc3ec1ef31582e0a591ed54440c3b1d7422a5164352b
font_01_sfnt_off0000d9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F9 10500 bytes
SHA-256: 2a81721f467a3d1725cd7da0b676311f17b099e14e7d772e399f23fd7f846b16

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