Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2839c8e74a82959…

MALICIOUS

PDF

79.7 KB Created: 2021-04-05 10:25:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e70d7d9f41e59fb7271e13fe08bc2b69 SHA-1: 687a572031789518fb6e450df1a3218e67e8b985 SHA-256: c2839c8e74a82959b54ef19a52c54d31417a90b95d4894eae7e222e524ce4c10
136 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics as malicious, including an ML classifier and ClamAV. It exhibits characteristics of an advance-fee scam, using lottery or prize language to entice the user. The embedded URL, https://soxebez.ru/award?keyword=causes+of+unemployment+in+ghana+pdf, is likely the next stage of the attack, aiming to deliver a payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://soxebez.ru/award?keyword=causes+of+unemployment+in+ghana+pdf
    • https://cdn.sqhk.co/bulelovuroga/rzaghhc/migobokujepe.pdf
    • http://anbieterbewertung-autoscoutch.com/983057198iupik.pdf
    • http://albl.ru/xiwivabumidoregabuvia8j57.pdf
    • https://cdn.sqhk.co/tamejenonisi/jZaUUjf/radio_flyer_movie_trailer.pdf
    • https://cdn.sqhk.co/zubavagi/UiWjhf4/57431223850.pdf
    • http://playmarket-online.com/17909187373ggs6p.pdf
    • https://cdn.sqhk.co/wogokodu/uabghrO/mapa_city_sightseeing_berlin_stops.pdf
    • https://cdn.sqhk.co/moromasi/VZd2ij7/free_online_slot_machine_games_with_bonus_rounds.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/522f1e49-45b2-4f93-851d-2afea0768f87/60134083426.pdf
    • http://loxogosune.rf.gd/verification_letter_information.pdf
    • https://uploads.strikinglycdn.com/files/7f087d5a-2717-465e-8dc2-fbc96d315f29/savage_stevens_320_security_review.pdf
    • https://uploads.strikinglycdn.com/files/cc20d496-6a1a-43a5-8b81-ed4654f6eccd/sullair_3700_air_compressor_manual.pdf
    • https://uploads.strikinglycdn.com/files/7a0ae045-e17a-4f47-9736-42022d845bbf/geometric_sequence_formula_and_meaning.pdf
    • https://uploads.strikinglycdn.com/files/7415f74b-359f-4868-9bc7-12367363b6ea/wishful_drinking_film.pdf
    • https://uploads.strikinglycdn.com/files/40548b96-c141-4452-b98f-29ca071ea468/how_to_check_cuisinart_warranty.pdf
    • https://uploads.strikinglycdn.com/files/bad402d8-a995-48fa-bd10-c3128c213b34/74956551317.pdf
    • http://xejidomu.rf.gd/rulegap.pdf
    • https://uploads.strikinglycdn.com/files/9a96dae6-e248-4f48-97ab-141d03fce9b5/bible_quiz_questions_and_answers_from_the_book_of_acts_in_telugu.pdf
    • https://uploads.strikinglycdn.com/files/cf53d106-fffe-428e-b4b2-70cb5061355c/i_spy_with_my_little_eye_rap_song_lyrics.pdf
    • https://uploads.strikinglycdn.com/files/f79f0c05-ff9b-46ab-932b-832d022ff9e2/hansons_marathon_method.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_off0000fab2.bin
1f6a9010d9a6bfb0e407fcafe3db1eeadcc98df76f2b6212322795728bb47d47		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB2 5364 bytes
font_01_sfnt_off00010cd8.bin
ab87751dbc758cd71769b7a504279ddf3f4edcb78e7511184dc77491748f70fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD8 10680 bytes

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