Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6238ceb60de8574…

MALICIOUS

PDF

76.2 KB Created: 2021-03-29 16:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d5ae0e0d650cb4f6948fb499ae6c68f SHA-1: c20ccf7eb0cffc4783f54f1b21e8b99289fcf998 SHA-256: e6238ceb60de857443cf20a8d12752939bc97b368942c0f4003a8b719578b0b0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files hosted on file-sharing services, indicating a link farm or redirection strategy. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/strik?utm_term=lg+stylo+6+release+date+2020
    • https://lelodudovoveju.weebly.com/uploads/1/3/1/6/131607117/kajetuvojufodiw_jawamuzijep.pdf
    • https://cdn.sqhk.co/japuwejede/iiWoesE/varifug.pdf
    • https://cdn.sqhk.co/moxibusas/jgjasMH/3170572618.pdf
    • https://raxeruzuk.weebly.com/uploads/1/3/4/7/134743740/jetadusupaz_maxufusif_saluvivovoxiv.pdf
    • https://cdn.sqhk.co/jivaduzar/6jerQih/aplicativo_de_photoshop_para_android.pdf
    • http://vurimujud.iblogger.org/rovekodeles.pdf
    • https://kigijizinelojuk.weebly.com/uploads/1/3/4/8/134848952/2567b3dea0f.pdf
    • https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/14e233920cd6d2.pdf
    • https://cdn.sqhk.co/timadupak/hbDhin4/all_eating_disorders_list.pdf
    • https://cdn.sqhk.co/xovikojux/icSjwlA/the_last_stand_left_4_dead_console.pdf
    • https://cdn.sqhk.co/gobejilu/gezdjgd/firulodubovur.pdf
    • https://cdn.sqhk.co/menodotitit/hwdhcDq/30623445835.pdf
    • https://fikejibin.weebly.com/uploads/1/3/4/3/134331262/lifebuvo.pdf
    • https://cdn.sqhk.co/gikunixa/FjgRgcs/7015267130.pdf
    • https://cdn.sqhk.co/daposofoxig/ahfidhd/super_why_abc_adventures_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lusuvurulap.epizy.com/riferekuj.pdf
    • https://s3.amazonaws.com/xovajukoxin/deadly_betrayal_movie.pdf
    • http://wimosatemegof.rf.gd/android_payload_msfvenom.pdf
    • http://texizozajon.rf.gd/tegutij.pdf
    • https://s3.amazonaws.com/kewuxejikiwe/bubanovuzutigagex.pdf
    • https://s3.amazonaws.com/meludav/how_to_conserve_energy_in_hotels.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_off0000e763.bin
1fd3b1a6563cd98ba66b9ef9f87b18b29072a09aa4f6857a04842c2c56671f8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE763 5464 bytes
font_01_sfnt_off0000fa14.bin
72195ac69f764f07009686fc8713d4a72aa1fc2134d089e2bb277131a88e63d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA14 11828 bytes

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