Malicious PDF — malware analysis report

Static analysis result for SHA-256 72621b0fde4ec602…

MALICIOUS

PDF

105.5 KB Created: 2021-03-11 13:42:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a73a69063ee38801cfc87dba3e71f6ae SHA-1: dc0edc24181ba6b4a2c728aaee80d55d56805e69 SHA-256: 72621b0fde4ec6024080a993be6b5f4c199b675c22a3339b3991328a7de1c0d8
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://golowaki.ru/123?utm_term=babri+masjid+full+hd+movie', which is likely a phishing or malware distribution lure disguised as a movie download. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting the lure hypothesis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://golowaki.ru/123?utm_term=babri+masjid+full+hd+movie
    • http://50off.pro/save_game_hay_day_androidufs48.pdf
    • http://front-glass.space/zovoredux28l9x.pdf
    • http://artyom.guru/realtek_high_definition_audio_driver_windows_10_64_bit_toshibav82uy.pdf
    • http://sfr-espace.best/treasure_island_books5ein.pdf
    • http://bbcua.site/overcoming_intrusive_thoughts_bookgjmli.pdf
    • https://cdn.sqhk.co/xeduwukaxusa/gZpJmbF/tripura_weather_report_rain.pdf
    • http://openlait.pro/ipod_touch_5th_gen_screen_sizeylyao.pdf
    • http://fimewot.xyz/rafugoxolugqr38o.pdf
    • https://cdn.sqhk.co/nogawevorus/fiaia5b/western_management_consultants_toronto.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dba46ba7-fbf0-48cd-adf7-4c3ec0fbe858/what_are_the_top_10_girl_names_for_2020.pdf
    • https://uploads.strikinglycdn.com/files/663a6df6-3c48-4ea7-93be-76b71e997f3a/32126813316.pdf
    • https://uploads.strikinglycdn.com/files/fdbd3567-fc9e-409d-8ea9-2f8dc1bf1a40/lifetime_health_textbook_download.pdf
    • https://uploads.strikinglycdn.com/files/55e7cc64-85c8-414a-967a-615cf3ae017f/62264258957.pdf
    • https://uploads.strikinglycdn.com/files/1af25cf9-b371-4d2b-8e14-a2f400575ac4/25635748720.pdf
    • https://uploads.strikinglycdn.com/files/c8783066-d3c7-4ff1-bca8-680a710b7edc/value_education_meaning_in_marathi.pdf
    • https://uploads.strikinglycdn.com/files/9009542a-35e9-488a-9548-f2531f58a2ff/12375010142.pdf
    • https://uploads.strikinglycdn.com/files/9ccb56e2-5089-413a-abe1-14595c77e472/can_you_accept_the_randomness_of_life_by_ralph_lewis.pdf
    • https://uploads.strikinglycdn.com/files/237b71bf-20be-49a8-aaae-4a29941d7aad/99749055296.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_off00015f16.bin
9f737835a4cec7001d3b972b85c7779a186e84e90597770ccaef20754c7abd4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15F16 5472 bytes
font_01_sfnt_off0001718d.bin
0f2fd9c8359b25f64dcb8150c436fd823c46943fca872e6ee4665d4ac63be125		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1718D 11852 bytes

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