Malicious PDF — malware analysis report

Static analysis result for SHA-256 519019b60fcd0450…

MALICIOUS

PDF

108.7 KB Created: 2021-03-17 18:41:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d7741592ad7a6c41c202230f8758b7a SHA-1: efd32d1e3faebafbbe2ee25d9465dc2d3507cab4 SHA-256: 519019b60fcd04502cd1f341005710e5595808c670303d654927b8e205c646b1
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by both heuristics and a machine learning classifier as malicious. The ClamAV detection further confirms its malicious nature, flagging it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'Bohr magneton pdf'. The presence of an external URI heuristic indicates an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://jacksth.ru/award?keyword=bohr+magneton+pdf
    • http://intereriia.com/xisakejagerubodimes86yu.pdf
    • http://2022god.com/how_to_train_your_dragon_4_full_movie_in_english_2019cy2op.pdf
    • http://prazdnikprosto.ru/unicorn_dress_up_games_free_onlineooc6v.pdf
    • http://reabook.online/36111493382omdz6.pdf
    • http://prechambre.xyz/filmlinks4u.net_adults_englishrk5lm.pdf
    • http://marinarus.space/mobijajyols.pdf
    • http://kompledom.com/58376285432v3lyk.pdf
    • http://bioforce-co.site/how_to_reset_redhead_safeyu8nq.pdf
    • http://tizezs.xyz/why_is_medicine_so_cheap_in_mexicoyzcd2.pdf
    • http://stonersfranchise.com/universal_music_fire_list_of_artists0gs4y.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/fb4d87b3-758f-473e-ad3a-98d73e361d91/redipagerejini.pdf
    • https://s3.amazonaws.com/werowibovezoje/paxifaranawek.pdf
    • https://uploads.strikinglycdn.com/files/c6066d63-89a7-4cb1-80d1-c1aeb9906ac5/luketafibila.pdf
    • https://s3.amazonaws.com/lomogas/sharp_microwave_drawer_operation_manual.pdf
    • https://uploads.strikinglycdn.com/files/870885ee-ab89-412a-97b1-c361c005985f/57841829960.pdf
    • https://uploads.strikinglycdn.com/files/1033fd2d-6499-41de-8d43-e3b62cbc85be/beyond_the_wall_game_of_thrones.pdf
    • https://uploads.strikinglycdn.com/files/a81e3a6e-8c5b-4671-a5c6-b2643138a441/wipepapekujinelotar.pdf
    • https://uploads.strikinglycdn.com/files/8910512d-11f3-4f3c-8ffd-703537322a06/10173879207.pdf
    • https://s3.amazonaws.com/lixisariwulo/aaru_songs_tamil.pdf
    • https://s3.amazonaws.com/ginutu/tajiwotujumemoretetip.pdf
    • https://uploads.strikinglycdn.com/files/d85c7927-969a-4a10-ae94-d80bf9d02a07/how_to_setup_a_brother_printer_on_mac.pdf
    • https://s3.amazonaws.com/sazomo/bangla_song_music_ringtone.pdf
    • https://uploads.strikinglycdn.com/files/702ae875-0cf4-4de4-9f19-6b74a654e62b/5559668967.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014104.bin
e374218b51f5ed9e3d028afd7e910c5cd9ebdc39bf988c5bff637ab8cc43eda7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14104 5032 bytes
font_01_sfnt_off000151f1.bin
7fabc245e7730f9dd4d3d56043952c5c302864869fda592e8dc3729099f30ef1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x151F1 14208 bytes
font_02_sfnt_off0001803f.bin
da2035ce16f2ca08a59ab0865927fe2592fcd9ba31325ea75c515b93e85cb79b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1803F 16256 bytes
font_03_sfnt_off000195c2.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x195C2 4324 bytes

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