Malicious PDF — malware analysis report

Static analysis result for SHA-256 76ed436ba84132d6…

MALICIOUS

PDF

85.6 KB Created: 2021-03-11 09:48:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4aaf83deed1123eeb3fed55aa8f1d0a SHA-1: d0531acfa22150ee5eac09e685d121b8c3a74d04 SHA-256: 76ed436ba84132d6ecb59c7652456a6de4bde352ac582424562c42ad9b8598f3
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or phishing lures, and ClamAV detected it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to malicious sites, potentially for credential harvesting or further malware delivery. The primary malicious URL identified is https://xezojetit.ru/wix?keyword=jam+live+true+wireless+earbuds+manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://xezojetit.ru/wix?keyword=jam+live+true+wireless+earbuds+manual
    • http://dudisigufazalu.22web.org/33451632190.pdf
    • http://fomijegi.mypressonline.com/post_office_ssa_account_balance_check.pdf
    • http://nasufulorejuwe.mywebcommunity.org/fl_studio_tutorial_hip_hop.pdf
    • http://tareworig.mywebcommunity.org/ejercicios_resueltos_de_algebra_booleana.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://def26600-86c9-4442-a738-094ddf2992d1.filesusr.com/ugd/eb5a6a_5ca8b1e418c64f72b819f16bc4faaafd.pdf?index=true
    • http://bezepegu.epizy.com/jkbose_date_sheet_8th_class_2019_kashmir.pdf
    • https://s3.amazonaws.com/tobito/46048035777.pdf
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_541b5c17dca74db89483f1cfc01ca6e3.pdf?index=true
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_f9e8f980fb0c4ecc967742ca3232d490.pdf?index=true
    • http://bolirazebaf.myartsonline.com/how_to_read_electrical_elementary_wiring_diagrams.pdf
    • http://maxuluxusit.atwebpages.com/base_de_datos_relacional_ejemplos.pdf
    • http://moxuwujapuj.rf.gd/49280229762.pdf
    • https://s3.amazonaws.com/dutimajizowa/95378586397.pdf
    • https://cd70d4e5-4a1a-4071-96d1-f2415ea5ece1.filesusr.com/ugd/7f46b5_f86436c5cece40a7a0fcfa4cf73cad66.pdf?index=true
    • https://s3.amazonaws.com/tugabijenovili/commando_2_2017_full_movie_480p.pdf
    • http://talakukatutevib.epizy.com/osho_courage_the_joy_of_living_dangerously.pdf
    • https://s3.amazonaws.com/kigavanus/zegajalaxubidune.pdf
    • http://wilazetifoka.epizy.com/puberty_menorrhagia_rcog_guidelines.pdf
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_d30976034db744dcbab012f1672fa00b.pdf?index=true
    • https://s3.amazonaws.com/benubapopikaj/puvetefubir.pdf
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_6f1e20a1dc4b403bb3287c04123e2cbb.pdf?index=true
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_1dc8d2e162ad473c9686851b2cf0a2d8.pdf?index=true
    • https://c72a6d71-2fad-4f5a-8b7a-a7c165485bce.filesusr.com/ugd/a4966f_6214869b82fc4f9ca5550c9212388b05.pdf?index=true
    • https://s3.amazonaws.com/vajefam/mipiwirefaredivezezukel.pdf
    • https://s3.amazonaws.com/gusule/80204867147.pdf
    • https://c580675e-8888-491d-8c80-3106eaac86fb.filesusr.com/ugd/c8a981_3fe8924141e94475b6d18617f0c55b43.pdf?index=true
    • 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_off00010951.bin
78eb0a101c90a3e1959644a31abe00a4fb6b104eac43f6b493abb1be8cfef1b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10951 5252 bytes
font_01_sfnt_off00011b29.bin
760fc233f66e3219cd22ea9fc7c6471eca6d3e8908e9cfa9d876b359bd7b6b70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B29 14688 bytes

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