Malicious PDF — malware analysis report

Static analysis result for SHA-256 35faf8266aa46e61…

MALICIOUS

PDF

80.1 KB Created: 2021-03-27 15:49:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd8155a7eda64e0fa45545be3da1340a SHA-1: a9efc77c83f8b8f4dca99be1d942a83131917e97 SHA-256: 35faf8266aa46e61124a710319bc3251cfcd95de2b223b145b4dd503eaf9b516
104 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains embedded URLs, one of which, 'https://jumiwimov.ru/wix?keyword=shrek+2+google+drive+avi', is directly associated with a heuristic firing for an external URI. The presence of a 'download button' heuristic further suggests a lure to trick the user into downloading a payload. While no scripts were explicitly extracted, the nature of the embedded URLs and the ML classification indicate a likely intent to distribute malware or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/wix?keyword=shrek+2+google+drive+avi
    • http://vosajizegek.mypressonline.com/apush_amsco_book.pdf
    • https://cdn.sqhk.co/xonivozew/IgijeYx/calamity_mod_starting_guide.pdf
    • https://cdn.sqhk.co/kinanekoxo/jggphjc/resident_evil_7_dlc_coins.pdf
    • https://cdn.sqhk.co/tatakakuwito/dI0GbAf/20434884145.pdf
    • https://cdn.sqhk.co/xajamenujo/jahehiZ/life_is_strange_ps4_game_mania.pdf
    • http://vuzetasavuxoso.mygamesonline.org/96603542548.pdf
    • https://cdn.sqhk.co/javomekoru/icgjhhD/hoggy_2_trophy_guide.pdf
    • https://cdn.sqhk.co/definuseju/cQgiggL/tubolajovapesarab.pdf
    • https://cdn.sqhk.co/wuzededoz/jeggifq/falling_water_falls_arkansas_camping.pdf
    • https://cdn.sqhk.co/mukujoripu/iIVfMbA/rune_pickaxe_osrs_shop.pdf
    • https://cdn.sqhk.co/savekedeg/hgejgid/bearing_size.pdf
    • https://cdn.sqhk.co/dodirorip/fhIhg3F/port_lympne_zoo_passport_prices.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/67897ada-1e5f-4c0d-b66d-2ee24985251a/tuvejovu.pdf
    • https://uploads.strikinglycdn.com/files/f1ec8062-d429-43e3-bfb5-79b4fc1ed466/focusrite_scarlett_2i4_2nd_gen_review.pdf
    • https://uploads.strikinglycdn.com/files/28f42c32-af04-4065-b264-0143579ef8ac/solving_logarithmic_equations_worksheet_kuta.pdf
    • https://s3.amazonaws.com/xeruxaxer/44266127720.pdf
    • https://uploads.strikinglycdn.com/files/d8394904-1a63-43a7-bdb5-934916e7202f/youtube_how_to_crochet_socks_for_beginners.pdf
    • https://s3.amazonaws.com/ruzaganog/leboxob.pdf
    • https://uploads.strikinglycdn.com/files/9699727f-3200-4115-8383-0067e3ea3f36/world_war_z_game_ps4_controls.pdf
    • https://s3.amazonaws.com/zubata/39033456344.pdf
    • https://s3.amazonaws.com/nawosineromigi/jutijutepal.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_off0000fe0b.bin
0a2a723abe7eac234eac5d5112c5bacc8cb5f2d3ff49426b05393a616d75f34a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0B 5268 bytes
font_01_sfnt_off00010ff5.bin
c5dceb06c06302be1ad8e495ee90d9fdea47670476a4fc31b11b2ec027444ae1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF5 10296 bytes

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