Malicious PDF — malware analysis report

Static analysis result for SHA-256 6998b1a26fabe995…

MALICIOUS

PDF

74.8 KB Created: 2021-04-02 22:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: eb0e390256fa18f69e126f163aa4b1f8 SHA-1: 2752bdb9ca47a4cd314b930c084a7e286095daf0 SHA-256: 6998b1a26fabe995962bee0f89286d32e495775d8fd00fd127c73d1ee2174e34
116 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating malformed exploit streams and embedded URLs, with a high ML confidence score and ClamAV detection flagging it as a phishing trojan. The embedded URL https://leonvi.ru/award?keyword=changing+pdf+documents is likely the primary lure, attempting to trick the user into visiting a malicious site. While no scripts were explicitly extracted, the PDF structure and exploit indicators suggest it may leverage JavaScript for malicious actions, such as redirecting to the identified URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://leonvi.ru/award?keyword=changing+pdf+documents PDF link annotation
    • https://cdn.sqhk.co/sofilita/hjejbjh/9773234301.pdfIn PDF document text
    • https://cdn.sqhk.co/wagomito/hgecigX/85042737927.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/ticv9ha/77240513355.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/hDSQhdD/legendary_stuntman_run_mod_apk.pdfIn PDF document text
    • http://summ-ita.space/jagaduh337.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/hjmRibq/inside_the_box_movie.pdfIn PDF document text
    • http://lnstagramverifycentre.com/woletadida4oyly.pdfIn PDF document text
    • https://cdn.sqhk.co/suvotoruwot/hbicmjg/dop_draw_one_part_level_17.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/7rujhgi/dog_runner_treadmill.pdfIn PDF document text
    • http://bloomwithdeanna.com/how_to_update_lowrance_hds_gen_1ujzyy.pdfIn PDF document text
    • https://cdn.sqhk.co/sabumijobude/xF5ibjh/tiles_for_kitchen_wall_and_floor.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/xulikamul/asbaab_an-_nuzool.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/javawavamowumasewiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a20eaec-ad2c-4357-a550-9c6041224a63/50592514011.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/62948211838.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/77352931584.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/bujiruvodazutimi.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/chrono_trigger_snes_strategy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/characteristics_of_entrepreneurship.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/tapuremegazasotexus.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/belgrade_bus_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3c85886-bca9-4f4a-a3b6-2daa3c59e98b/82864528795.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_off0000e793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE793 5348 bytes
SHA-256: ec6395106114f21acd1fdeade614ce9ec273f27757c22d4a7188cd974569174d
font_01_sfnt_off0000f9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A5 10492 bytes
SHA-256: e5f04960bd26b1ab9c5edfbb44639c17b9edfef527e273b189bc331cc7b7451f

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