Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2fb2213d718e7d…

MALICIOUS

PDF

68.4 KB Created: 2021-01-02 09:32:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 473a1a5cc96800f649f497db7722590b SHA-1: 1004abadb321f9309a52f3c562a55936e16bb95d SHA-256: 8e2fb2213d718e7d777f6fe086c0891070bc43e293032043f8c5dd5ce81b04e0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a malicious redirector link and is flagged by a machine learning classifier as malicious. Heuristics indicate it's a browser extension installation lure, a common social-engineering tactic. ClamAV also detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/aws?utm_term=add+video++extension+chrome In PDF document text
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/kakegibefokow.pdfIn PDF document text
    • https://cdn.sqhk.co/ledumixifer/Tr3RjaT/93049928891.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468820/normal_5fd819ef11357.pdfIn PDF document text
    • https://mamotuzukaw.weebly.com/uploads/1/3/4/4/134438076/buzofolagan_narusukokaxemu.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/xisuj-somulomexuji.pdfIn PDF document text
    • https://jinijazi.weebly.com/uploads/1/3/4/6/134668286/46ccb365c09.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/bbbc733e-b3a7-43ff-9224-d90966e45d47/x_one_phone_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ff85a9-69aa-4f57-891b-339809e82c82/1642029083.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/843c782f-7ddc-4ece-b0f9-fcf331d3ec87/34999559784.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c93f95a2-ffb8-4a65-8d3a-c405b5e6a982/penogigutova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19cae8e8-f33e-4b66-8ec7-8f289f44542f/20463600950.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/524d947f-55b0-4aab-bb22-a8830567b65d/service_above_self_award.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_off0000d053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD053 5056 bytes
SHA-256: 4fe2b92b9a2bdc32e4c0eca4d3f7587f0a30d7cf339e857c122b529a4d2ad89c
font_01_sfnt_off0000e164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE164 10512 bytes
SHA-256: a8c74e3274f666f5a16fc648e2c4e363887a59d9677e716ca5603cc4b40c6f0e

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