Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e09d9ae3de929a7…

MALICIOUS

PDF

80.1 KB Created: 2021-04-01 17:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a424f17fd19f704ec7c950101bab2af SHA-1: ad0b48c7ebcd7e9dfc133640d3586a26cd2a09fc SHA-256: 7e09d9ae3de929a71b2c4f45b2b2933b11fb32c3680204f0be8c14c4d11fdc6d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to host malicious content. The presence of external URIs suggests an attempt to redirect the user to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nipisod.ru/strik?utm_term=conjunction+words+list+in+english+pdf
    • https://cdn.sqhk.co/kajipazuto/jahhhaU/apakah_game_assassin_creed_identity_offline.pdf
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/3c351c.pdf
    • http://lajulufubugo.22web.org/acronyms_of_computer.pdf
    • https://pafolerasakuj.weebly.com/uploads/1/3/1/4/131438226/jexipapa_zaravef.pdf
    • https://resuzomesidi.weebly.com/uploads/1/3/4/7/134746605/fb7f5.pdf
    • http://woravesamoz.22web.org/ateten_gmlek_can_yaynlar.pdf
    • http://pokemonrivals.online/62925899707az6xz.pdf
    • http://rutamijojiru.iblogger.org/765093342.pdf
    • https://gisoroweri.weebly.com/uploads/1/3/4/8/134893792/29d7030c79.pdf
    • https://cdn.sqhk.co/gupimupiset/hAnhcia/bug_s_life_characters_grasshopper.pdf
    • https://cdn.sqhk.co/letarezetap/jjgcjiX/bluestacks_hd_app_player.pdf
    • http://lixuzixewufixib.66ghz.com/sijub.pdf
    • http://presentinsta.online/266003929048cs89.pdf
    • http://you-bestshop.xyz/indycar_vs_f1_car_specs8hn85.pdf
    • http://larediwavokib.iblogger.org/adverbs_worksheet_3rd_grade.pdf
    • http://strongcreditscore.info/excellence_riviera_cancun_promo_codeh6tmb.pdf
    • http://wisitens.online/walt_whitman_mall_santa_2020gtb1n.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://daduzafez.epizy.com/free_printable_certificate_of_completion_template.pdf
    • http://tibuwol.rf.gd/vba_excel_save_as_fit_to_page.pdf
    • https://uploads.strikinglycdn.com/files/742e9565-ae2f-4739-afcc-a94abf0d9c3c/3665259959.pdf
    • https://uploads.strikinglycdn.com/files/7b6b5960-cecd-426e-a64f-af79d5184367/john_rawls_theory_of_justice_in_hindi.pdf
    • http://feliruxitekul.epizy.com/how_to_stop_a_motion_sensor_light.pdf
    • https://uploads.strikinglycdn.com/files/50b18fa2-a08e-4dad-953e-dfb0913d23b6/sony_xplod_subwoofer_12_review.pdf
    • https://uploads.strikinglycdn.com/files/df7c1163-cb2a-4019-9128-0ce96be0dffb/the_vampire_diaries_quiz.pdf
    • https://uploads.strikinglycdn.com/files/a9184b82-e1cc-4470-9f9d-fddebd7c8795/yaesu_ft-7800r_manual.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_off0000fb97.bin
fd976dcdc0d5ea92c1215f1c7ed90e9840de7e8ec93cc87ce13120c6bf525825		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB97 5280 bytes
font_01_sfnt_off00010d99.bin
605f6f5c65deca047596d365069748888ddfb4893da574ef66e0e0eba7fbd54c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D99 11180 bytes

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