Malicious PDF — malware analysis report

Static analysis result for SHA-256 c057cd478a4d94b3…

MALICIOUS

PDF

72.0 KB Created: 2021-02-28 03:26:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef45e4ecd38faf3799c251cddd31bb30 SHA-1: baf95a9dec2bed951c79c30d36f54bfa822a31ff SHA-256: c057cd478a4d94b3f08dd7ff60a3d8778022b893356898e665586d6659622a93
126 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to functional training exercises, likely intended to trick users into clicking on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jumiwimov.ru/123?utm_term=what+is+functional+training+exercises
    • https://gesaseli.weebly.com/uploads/1/3/1/3/131379828/0060fa20bbe.pdf
    • http://dagomakiluje.iblogger.org/85815432641.pdf
    • https://cdn-cms.f-static.net/uploads/4473637/normal_600b96406e86e.pdf
    • https://nozezekotelipub.weebly.com/uploads/1/3/4/8/134883262/9083763.pdf
    • https://cdn-cms.f-static.net/uploads/4389106/normal_5fd33c4765df7.pdf
    • http://xozemapij.22web.org/sql_server_2012_books_online.pdf
    • http://seamanygau.best/54552305678yi9h1.pdf
    • https://static.s123-cdn-static.com/uploads/4454046/normal_60039791a536c.pdf
    • http://organic100.fun/gw2_crystalline_heart_guidea01da.pdf
    • https://static.s123-cdn-static.com/uploads/4485448/normal_5ff2726425e6d.pdf
    • http://service-hire.com/883678132771goq8.pdf
    • https://cdn-cms.f-static.net/uploads/4464850/normal_6032f0f27aaed.pdf
    • http://docita.fun/7027258767210xl8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bisute/32661385091.pdf
    • https://s3.amazonaws.com/pulavokaxe/67863045056.pdf
    • https://s3.amazonaws.com/kozewuposoridil/harshvardhan_rane_images.pdf
    • https://s3.amazonaws.com/leteraxewe/arcanos_maiores.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_off0000de67.bin
4859ac27194785cc2bb024bbdcb8a37dd22429844108f88f580aae6ffa741b1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE67 5224 bytes
font_01_sfnt_off0000f03c.bin
6d6debca802729715ec9799d16247ee69b03a909851655c0d17aa5ff3049afe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF03C 10164 bytes

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