Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5c5129a1a54a630…

MALICIOUS

PDF

67.7 KB Created: 2020-11-25 04:41:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3389aed8b3f7de8cb97464f971dc1b4 SHA-1: 18b7dc4c63396af9f5318866cc0232cc8e47e186 SHA-256: c5c5129a1a54a630e47a8287be568eb14d0fff611fe845a6ff9cf02d674744ed
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including ClamAV and an ML classifier. It contains embedded links that redirect to known malicious infrastructure and a link farm. The document body appears to be obfuscated or corrupted, but the presence of these malicious links strongly suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=maclaren+quest+stroller+2015
    • https://fitezaxuju.weebly.com/uploads/1/3/4/7/134724711/b9f0ce40eb0d.pdf
    • https://cdn-cms.f-static.net/uploads/4382972/normal_5fad3e05d4c14.pdf
    • https://cdn-cms.f-static.net/uploads/4368770/normal_5f98618123230.pdf
    • https://cdn-cms.f-static.net/uploads/4386330/normal_5fadd03add03e.pdf
    • https://cdn-cms.f-static.net/uploads/4387411/normal_5f8d2d7c9d247.pdf
    • https://cdn-cms.f-static.net/uploads/4379035/normal_5f8b4cddaef38.pdf
    • https://tupokigefadewun.weebly.com/uploads/1/3/4/7/134702618/makawidobize.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e4f579fb-a53c-4458-8e68-492d4843fc18/trac_dynamique_premiere_pro.pdf
    • https://s3.amazonaws.com/xidulumexi/earth_science_worksheet_answers.pdf
    • https://uploads.strikinglycdn.com/files/b455b41d-d8ab-4871-a2fb-0c0bd82b97c1/bepuzodudidotomevuwanukol.pdf
    • https://uploads.strikinglycdn.com/files/5ebdb587-2784-4b21-b502-441de9cd58bd/days_of_future_past_rogue_cut_download.pdf
    • https://uploads.strikinglycdn.com/files/2e84d424-937c-4995-8e2f-8c415bf8a302/google_drive_download.pdf
    • https://uploads.strikinglycdn.com/files/643d07ca-21b3-4e67-9d31-e17d74629ece/satonubikevemazezeduki.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd5f.bin
ef67562e6b2ebb18f8fdd9fb31d1a1906de36b5ec4ff46c885c9dc9336bb1707		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5F 5376 bytes
font_01_sfnt_off0000dfca.bin
2d0dfcc9870bd92251b3b29db61d897fa36a04866654011fe18b2dd236a5250a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCA 10184 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.