Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbb8127fd5c7eaf6…

MALICIOUS

PDF

83.5 KB Created: 2021-03-15 20:15:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbe2c8f6743e8aa9d2a7f52303eee7f3 SHA-1: ea724e555d115d7d9c7e7d269f5c28094e5f3a87 SHA-256: dbb8127fd5c7eaf6aafb01ed3fe2d0af528dda4e5d57dbb5eec8ef2237dcd577
104 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan. Heuristics indicate it contains an external URI and is presented as a fake invoice or payment lure. The embedded URL, https://dafemum.ru/award?keyword=artist+management+toolkit+pdf, is the primary indicator of compromise, likely leading to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://dafemum.ru/award?keyword=artist+management+toolkit+pdf
    • https://cdn.sqhk.co/jigugabopu/fkijSUq/nwsl_expansion_draft_predictions.pdf
    • http://hookup668.site/16742318061k4zi8.pdf
    • https://cdn.sqhk.co/raserijene/Lyijmqv/33081648532.pdf
    • https://cdn-cms.f-static.net/uploads/4411500/normal_604d0d0d2e6f4.pdf
    • http://nadahul.ru/xuxozelp8rqx.pdf
    • https://static.s123-cdn-static.com/uploads/4413226/normal_5fcb636131aa1.pdf
    • https://cdn-cms.f-static.net/uploads/4370052/normal_5fd159af0d30b.pdf
    • http://lnstgramhelpcopyright.com/botovozagisoriserajit00hi.pdf
    • https://static.s123-cdn-static.com/uploads/4456984/normal_5fdf567dd43f7.pdf
    • https://cdn.sqhk.co/nilofixogezu/aJgjge1/best_free_repost_app_for_instagram_iphone.pdf
    • https://cdn.sqhk.co/navuwamas/ih3nlSG/super_sonic_games_free_online.pdf
    • https://cdn.sqhk.co/jizuxadif/id8Kije/flexeril_overdose_wikem.pdf
    • http://leyloften.online/44875948084outdl.pdf
    • https://cdn.sqhk.co/vuvapolaxaj/3jiLCjb/download_mtb_downhill_multiplayer_mod_apk.pdf
    • https://cdn.sqhk.co/wanoziku/a5ihjfS/6975578961.pdf
    • https://cdn.sqhk.co/bopibege/a8ibohh/chinese_checkers_online_2_human_players.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bdc374c2-2403-459b-8708-db4ac77107d0/xefodadeb.pdf
    • https://uploads.strikinglycdn.com/files/e8fefa21-0001-4e3d-9400-13933044708b/wd_my_passport_wireless_pro_ios_app.pdf
    • https://uploads.strikinglycdn.com/files/ab2ebe64-722f-461a-82ce-7b238b166fda/stihl_hedge_cutter_hs45_parts.pdf
    • https://uploads.strikinglycdn.com/files/0ab6263f-a1bb-4e8e-b64a-a993b09198e7/3d_earth_science_project.pdf
    • https://uploads.strikinglycdn.com/files/619f31bc-5f7d-479d-a198-82e54bff6b7f/47898158981.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1f0.bin
7d4737d494f683e2088d50aa644e7be6ed05479f263c57a8438d91de8e7eef4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F0 5416 bytes
font_01_sfnt_off00010447.bin
4225bbc3f2529b4f824c161368376c3af9b834494666222f4bc7fb2fb3de7235		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10447 11340 bytes
font_02_sfnt_off00012b40.bin
64f21e55c2f29c6f605e8f9fd96e7f7b34f9b4a26fdc717ddead948457370e3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B40 16148 bytes

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