Malicious PDF — malware analysis report

Static analysis result for SHA-256 fac244597e5e619f…

MALICIOUS

PDF

77.4 KB Created: 2021-02-28 13:23:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d445719290f28af762323962ba4d71a2 SHA-1: b27988db894ab59c42ecf6940bbdaef7b6e33d93 SHA-256: fac244597e5e619f1652b1df715a8d0e36bd416b39c1f7b61cb2e67aeeda5937
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'Metroid Prime 4 2020' and 'wkhtmltopdf', likely as lures to entice users to click on the malicious links.

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
  • 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://botokaw.ru/strik?utm_term=metroid+prime+4+2020 PDF link annotation
    • https://cdn.sqhk.co/lamiwifa/dhjiMjb/kejirikijuxebozojeje.pdfIn PDF document text
    • http://trysoda.club/nuby_manual_breast_pump_videoq7268.pdfIn PDF document text
    • https://zodefamebatum.weebly.com/uploads/1/3/5/9/135967531/xutapevi.pdfIn PDF document text
    • http://nexekeb.iblogger.org/100_attendance_certificate_free.pdfIn PDF document text
    • https://vekiruwubutut.weebly.com/uploads/1/3/1/0/131070393/kiganaxevefedotato.pdfIn PDF document text
    • https://cdn.sqhk.co/wajewukudino/ghoVXic/migine.pdfIn PDF document text
    • https://varupeneg.weebly.com/uploads/1/3/0/9/130969993/5596192.pdfIn PDF document text
    • https://cdn.sqhk.co/jigekuragige/bLhcpji/81443047698.pdfIn PDF document text
    • https://xejukogafowoje.weebly.com/uploads/1/3/2/6/132682905/guvajezi.pdfIn PDF document text
    • https://lepoboniw.weebly.com/uploads/1/3/0/9/130969744/4807999.pdfIn PDF document text
    • http://mnogolidov.xyz/mubenalevawodijoniwopodb3zj.pdfIn PDF document text
    • http://toportt.online/73556419080br28b.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/zepifudoxapo/64903666474.pdfIn PDF document text
    • http://kowefejarozop.epizy.com/batalegebab.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/kakazitiwumeparal.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/napaw.pdfIn PDF document text
    • http://zufarelizija.epizy.com/bloody_valentine_full_movie.pdfIn PDF document text
    • http://fusezumapaj.epizy.com/bejazuguzutujiposupojavet.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_off0000f234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF234 5052 bytes
SHA-256: 97004f4eca0050d6e661b93bf5705cc3a51486add59831fcf0667d0ecc66213f
font_01_sfnt_off00010361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10361 10944 bytes
SHA-256: ad1ccb27b26433e6c5a248d748fe209e50de9f516911ded496815a9ea3dbddd8

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