Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8d77a5cfec980f2…

MALICIOUS

PDF

80.6 KB Created: 2021-03-24 00:21:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37c994e5651a26fcc0e514ef43361d9f SHA-1: 289012d5d0e7eb1f50a7c38aacbf648c92deda2f SHA-256: f8d77a5cfec980f25513fd082782569160c235bddb35a168b8a3c522fdf7dbbe
96 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one prominent URL suggesting a lure for academic material. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the presence of embedded URIs and the overall detection profile point towards a phishing attack designed to trick users into downloading further malicious content.

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://resalured.ru/wix?keyword=lehne+pharmacology+for+nursing+care+9th+edition+pdf+free
    • http://idclick.cash/how_to_remove_the_front_of_ge_spacemaker_laundryifvxs.pdf
    • http://naturalik.fun/beretta_transformer_medium_soft_gun_case6uzl8.pdf
    • https://cdn-cms.f-static.net/uploads/4420905/normal_60179c39ef63f.pdf
    • http://gatorama.space/12732336060t8pck.pdf
    • http://instapresent.site/cheat_engine_6.5_free_download_for_pcnykk9.pdf
    • https://cdn.sqhk.co/janawezexoj/id94ibc/20296258544.pdf
    • https://cdn.sqhk.co/petawelesup/ihsjdJB/hitman_sniper_assassin_mastery.pdf
    • https://static.s123-cdn-static.com/uploads/4451551/normal_6004fd7103c70.pdf
    • http://lp-consalt.ru/how_do_i_change_the_time_on_my_panasonic_cordless_phonewuaix.pdf
    • http://garantiya62.ru/dorian_gray_summary_chapter_9b9ua7.pdf
    • https://cdn.sqhk.co/tamupoto/hGgcchj/fafabuso.pdf
    • https://cdn-cms.f-static.net/uploads/4366367/normal_601548c5da8f8.pdf
    • http://komozazene.getenjoyment.net/36555421631.pdf
    • http://risumeboze.getenjoyment.net/le_guide_de_l_orthophonie.pdf
    • https://cdn-cms.f-static.net/uploads/4418401/normal_60254066009c4.pdf
    • http://wotidoteked.mywebcommunity.org/xedumepibutisokevuredol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9a7ae10a-2690-48a4-a529-8c5a34a937d0/los_juegos_del_hambre_sinsajo_parte_1_online_espaol_latino.pdf
    • https://uploads.strikinglycdn.com/files/9ebdeb82-37d6-45b9-9836-bbd40672e8ac/64843851085.pdf
    • https://uploads.strikinglycdn.com/files/f10c1001-6e94-4358-83b6-cd30e568db7b/kenmore_washer_and_dryer_set_reviews.pdf
    • https://uploads.strikinglycdn.com/files/fa445199-c8bc-4f87-acd4-df1727046c9e/calories_in_el_pollo_loco_flour_tortilla.pdf
    • http://xepatodop.onlinewebshop.net/88113540670.pdf
    • https://uploads.strikinglycdn.com/files/e8e0a040-8741-4548-91b9-d46cf1d98f88/what_is_the_role_of_a_prison_warden.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_off0000f8dc.bin
e6a5074dc4b83a8198be4135e3a66a64271aa3d2e6ff6d377f88a0e51b3df915		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DC 5768 bytes
font_01_sfnt_off00010c64.bin
5938069f59e3c8d386787c1a15724ddd6cf85068164e12d3e99b624f2afd4fb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C64 11328 bytes

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