Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f93c84888152ad8…

MALICIOUS

PDF

69.9 KB Created: 2020-12-31 16:06:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6d692c8605ca8e52b7df09509fbf32f9 SHA-1: bd9bf2d0743f33bdb6050d03e7092a41effa5b8d SHA-256: 6f93c84888152ad89c714bd1cf077fcd97b5575b1fa6edef5fd231e016e6e5c4
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a campaign to drive traffic to potentially malicious sites. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ggtraff.ru/123?utm_term=fifa+12+manual+ps3 In PDF document text
    • https://cdn.sqhk.co/golomamone/xBvhdjh/20697928856.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/mDjhhaB/cloud_bubble_shooter_game_download_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450140/normal_5fb4fb4331d25.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/ciXgihb/64616315365.pdfIn PDF document text
    • https://valezofijamope.weebly.com/uploads/1/3/4/4/134445284/ff2dc8ab7c5019.pdfIn PDF document text
    • https://bewupoterefi.weebly.com/uploads/1/3/1/3/131380107/68222a251.pdfIn PDF document text
    • https://moxitason.weebly.com/uploads/1/3/4/3/134384587/jilonojibojixujulixa.pdfIn PDF document text
    • https://jipuzalo.weebly.com/uploads/1/3/4/6/134693454/kijanuf.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/sowewazulejewi/nudimoxoboj.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/pusejijolujoroparew.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/jacksonville_fishing_report_bob_mcnally.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38ea3937-800f-480c-94d6-795abe3de0a5/polycarbonate_division_2.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/sql_server_2017_media.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/17529284104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72dc1b6c-5c6a-4f71-a44c-da345716a2f8/fezomi.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_off0000d42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42C 5252 bytes
SHA-256: 935b24b558b87fbdf217dfc2343a54bf1046ad11c088653a4e59c725da890a6e
font_01_sfnt_off0000e609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE609 10716 bytes
SHA-256: e75a8039fd6744d42272c0653aa0b2f5970450faaba0c40221251ea59f2d3b96

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