Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a41abe3ab49ae37…

MALICIOUS

PDF

65.4 KB Created: 2021-01-24 23:33:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d2a8717408a0822941f5acdce8824a46 SHA-1: 2c2c1524240ed8cf2e5a380c7279f9dfd2e531a9 SHA-256: 2a41abe3ab49ae37ea15d08f869f76d6d56217f4ee853e0f3a644f48a98d5320
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, which is likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains text that appears to be a lure for ski race results, aligning with the phishing pretext.

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://trafftec.ru/123?utm_term=cisl+ski+race+results PDF link annotation
    • http://supportcopyright.net/mad_battle_royale_apk5epp2.pdfIn PDF document text
    • http://twitter-center.com/gallery_collection_cards_coupon0n6lw.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/ibhchb2/tidanijelikosutivivoka.pdfIn PDF document text
    • https://cdn.sqhk.co/tegatiwuwax/jhe2Sif/gonejasuxira.pdfIn PDF document text
    • http://goldstein.capital/best_sct_custom_tunes_for_6._0_powerstrokewdl71.pdfIn PDF document text
    • http://shmelev.pro/97768247629gt5xe.pdfIn PDF document text
    • http://repochka.site/two_smoking_barrels_castkzgtf.pdfIn PDF document text
    • http://dreamingdeveloper.com/950722670416le2u.pdfIn PDF document text
    • http://peludofnor.fun/shark_robot_vacuum_vs_roombawgd0w.pdfIn PDF document text
    • http://dompodklyuch.com/cars_movie_characters_yellow_car0yz8s.pdfIn PDF document text
    • http://interplast.ru/4581906036u0loh.pdfIn PDF document text
    • http://hookup681.site/mens_fall_wear_20207trxj.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/jiwisi/filches_crossword_puzzle_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/cake_i_will_survive_trumpet_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/93629106582.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/free_community_service_form_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/call_of_duty_ww2_zombie_mode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/86589722303.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_off0000c329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC329 4760 bytes
SHA-256: 75b2894715aed2b14e78834dd809443d20b6e5c07532106c933d7d65278c710c
font_01_sfnt_off0000d360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD360 10960 bytes
SHA-256: a58e97c0e02df22d8928cb6c7dc8c09cff4b5208ad86aa95fbacd2f5db485905

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