Malicious PDF — malware analysis report

Static analysis result for SHA-256 458fc730da59d593…

MALICIOUS

PDF

72.5 KB Created: 2021-01-26 08:42:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: cba57939439afcc6e09bcf9cce68a09a SHA-1: bfcc0f993c4c19232cefb5e97488f371af98d31b SHA-256: 458fc730da59d5934a6b1bb589df11fb52474ab2640641e9fe5a19cb41ad6174
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 a suspicious domain, trafffi.ru, which is likely part of a phishing or malware distribution chain. Although no scripts were explicitly extracted, the nature of the PDF and the embedded URI suggest it's designed to trick users into navigating to a malicious site.

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://trafffi.ru/123?utm_term=cooking+terms+crossword+answers PDF link annotation
    • http://dresdenpharma.ru/783774565370rkg2.pdfIn PDF document text
    • http://tijijosopake.22web.org/83994531166.pdfIn PDF document text
    • http://vnatural.space/global_soccer_match_euro_football_leagueswe8qn.pdfIn PDF document text
    • http://navaram.online/ufc_fight_tonight_time_centralh5d4e.pdfIn PDF document text
    • http://zazuvivilug.iblogger.org/62518354613.pdfIn PDF document text
    • http://devlp.design/fapasudejanawung9p9.pdfIn PDF document text
    • http://goodshopsales.xyz/jewewukijolalv3qex.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/mexavofezoxi/44919382526.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/dasawowukigiwizogeruruz.pdfIn PDF document text
    • http://dadorisisewane.epizy.com/bts_love_yourself_her_tear_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/amman_remix_cut_songs.pdfIn PDF document text
    • http://fabomisibis.rf.gd/wirabumizonuxuf.pdfIn PDF document text
    • http://bikutuvuxaxixo.epizy.com/fusionner_plusieurs_fichiers_en_un.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/cracked_steam_exe.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/54723214558.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/wink_hub_2_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/notification_sound_iphone.pdfIn PDF document text
    • http://sifusavukaga.rf.gd/azure_application_insights_weekly_telemetry_report.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/game_emulator_ps1_digimon_world_3.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_off0000e0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DD 5288 bytes
SHA-256: d550801693930f96ac6f6cfeeda96ed6d6357621f6c7679568c5d80a82c66eb1
font_01_sfnt_off0000f2d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D6 9936 bytes
SHA-256: fb5b99865e0657e49817aae4418895e121842d491867e0756514edce1b8bc0c7

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