Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade45f6137868352…

MALICIOUS

PDF

78.5 KB Created: 2021-03-16 02:25:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31be8414e1e5775d568dba0daa97387a SHA-1: 7cbe40144f86212f8e5363bb01476415cfeafe1d SHA-256: ade45f6137868352658964fc4334f32e57dc2516cdce76954fb9cfc86277dc66
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier also indicate maliciousness, specifically flagging it as a phishing trojan. While no scripts were explicitly extracted, the presence of numerous external URLs points towards an attempt to redirect users to potentially malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/wix?keyword=carpenter+cup+2019+scores
    • https://cdn.sqhk.co/jadepibake/iXuEjen/bus_simulator_indonesia_pc_online_play.pdf
    • https://cdn.sqhk.co/tasaxasup/ijpmfFK/hip_hop_dance_girl_pictures.pdf
    • https://cdn.sqhk.co/kipaselofuza/Ljahdhh/spider_trouble_mod_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bazobajinazar.rf.gd/sesemogimudepi.pdf
    • https://s3.amazonaws.com/jivuxo/ye_bhagwa_rang_ringtone_pagalworld.pdf
    • http://suzogoga.epizy.com/ant_video_er_for_firefox_64_bit.pdf
    • https://s3.amazonaws.com/buwosevax/spiderman_cartoon_in_urdu_free.pdf
    • https://2a403a33-5f6e-4534-96f9-742aa7325afc.filesusr.com/ugd/d2da83_32f89bfb55ef4a06bae3191356097afe.pdf?index=true
    • http://dezabefuzureb.rf.gd/28785478615.pdf
    • http://zopopujeji.rf.gd/hungry_shark_evolution_cheats.pdf
    • https://s3.amazonaws.com/masevewi/letter_heading_template.pdf
    • https://b64dd490-e5b9-492f-89ff-e398ecee904c.filesusr.com/ugd/5926b4_038ca192a0d74f9fb5224a9b54da6a32.pdf?index=true
    • https://591e60e9-54e8-4b06-a9a7-f2e0522969d0.filesusr.com/ugd/1fd4b7_ab8e7f5b74ec42ac98c334c14fc2478d.pdf?index=true
    • https://s3.amazonaws.com/penale/24745285390.pdf
    • https://s3.amazonaws.com/kotenu/73205087347.pdf
    • https://s3.amazonaws.com/tonisefoteka/71028190923.pdf
    • http://nutajowaga.rf.gd/telur_ascaris_lumbricoides.pdf
    • https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_619b691c64664cd1b94bb3a0907feaed.pdf?index=true
    • https://s3.amazonaws.com/wewuxuviwar/48237157859.pdf
    • http://domirewuzi.epizy.com/game_escape_from_chernobyl_mod_apk.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_off0000f5e5.bin
d8a8c61b66269fc3fae59370147d3a740487e1869ed01769e6129dad2d5b3eef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E5 5284 bytes
font_01_sfnt_off000107e4.bin
3d2b12c1a00330df5525852656f84655e828a34efcbd30c750fc490ae668edfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107E4 10944 bytes

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