Malicious PDF — malware analysis report

Static analysis result for SHA-256 3141231664f9f365…

MALICIOUS

PDF

83.2 KB Created: 2021-02-17 08:08:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 4a58ab2ace69e1cc47158dcdebe3c857 SHA-1: e12ce2ba1c8b8203463ebc4001ee657998bf02a4 SHA-256: 3141231664f9f3659dceef049e1c7c555169f61d269ce35037bee7a0d936c234
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://bologen.ru/strik?utm_term=oracion+a+san+judas+tadeo+en+casos+dif%25C3%25ADciles', which is likely the primary lure. The document body, though heavily obfuscated, suggests a prayer theme, which is a common social engineering tactic for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=oracion+a+san+judas+tadeo+en+casos+dif%25C3%25ADciles PDF link annotation
    • https://cdn.sqhk.co/gisatajofo/ggjj6ie/lugubifoduzikebup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486566/normal_6025ced799ea9.pdfIn PDF document text
    • https://cdn.sqhk.co/zawukomofise/chhhgcd/luvuzukeneli.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/hihj4YQ/spiritfarer_switch_physical.pdfIn PDF document text
    • https://cdn.sqhk.co/rurokusulos/3jgXHQb/tuzoz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486775/normal_6001d891938f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481403/normal_5ff64ee9dccd5.pdfIn PDF document text
    • https://cdn.sqhk.co/zoturisa/Hudgdje/emulator_for_psp_games_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/hhLK71R/slime_simulator_games_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vekudaselux/ygjthgi/aliens_drive_me_crazy_apk_mod_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/hbhjLAL/62176267880.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/takateg/27493542508.pdfIn PDF document text
    • http://lepajavawis.epizy.com/judy_moody_saves_the_world_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/tojusomi.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/jurnal_acacia_mangium.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/bittorrent_vs_utorrent_speed.pdfIn PDF document text
    • http://lokanubuxona.rf.gd/ps4_emulator_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/womudigifujasurabovagelof.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_off0001062a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062A 5172 bytes
SHA-256: 19b298694c79f93fc6ad64f52295f29fbcc73b072047389f96c534f0cbcc2045
font_01_sfnt_off000117d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D6 11504 bytes
SHA-256: f9d757ce5f9d3977fc1d5aa7efe509b38e85e14eebf90ba456eda24f5a584200

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