Malicious PDF — malware analysis report

Static analysis result for SHA-256 197b4f34128be9d3…

MALICIOUS

PDF

77.4 KB Created: 2021-04-10 04:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01916a763887fd420dbc2cf512cc9db1 SHA-1: c36bfb06d06867475de9c7401dee53e54bfd2b1c SHA-256: 197b4f34128be9d3e7d36e3b8fe7d5b89665167916d912b4070c5c5223d8fa9e
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, many of which point to disposable domains and are associated with link farm heuristics. The document body text is garbled, but the presence of a URL related to 'percy jackson on netflix' suggests a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/strik?utm_term=is+the+movie+percy+jackson+on+netflix
    • http://sakepugikunon.mypressonline.com/eclipse_cheat_sheet.pdf
    • http://idealica-italiaufficiale.site/how_to_use_iphone_4s_in_2020eb5mc.pdf
    • http://keto-menu.online/75578499428tdm3y.pdf
    • https://cdn.sqhk.co/fugovigul/Vhd8qhb/super_beyblade_coloring_pages.pdf
    • http://kikababono.mywebcommunity.org/definition_of_working_capital_management.pdf
    • http://podcard2020.site/community_trust_bank_lienholder_address8hrfg.pdf
    • http://dewodalaluw.mygamesonline.org/susivilemamafelavoxadan.pdf
    • http://sayseedokg.com/what_is_web_service_real_time_example09cw5.pdf
    • http://meetchat.space/birthday_photo_collage_maker_appe6wui.pdf
    • http://tulumiv.medianewsonline.com/xemadadutigar.pdf
    • https://cdn.sqhk.co/sexuzoropa/dJHhbjg/swing_shift_auto.pdf
    • http://mefizilexofe.66ghz.com/law_of_torts_book_india.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wopari/filavanixoketip.pdf
    • https://s3.amazonaws.com/wejuvono/ruretapoluj.pdf
    • https://uploads.strikinglycdn.com/files/e7e2f329-2259-4027-bd0a-20c96e7dadc2/girl_with_the_dragon_tattoo_trilogy.pdf
    • http://nadiripu.epizy.com/7844850942.pdf
    • https://s3.amazonaws.com/kifutizijebuj/73137468401.pdf
    • https://uploads.strikinglycdn.com/files/553b1f38-c4d8-4e3d-9af9-773987cc9c16/62665979525.pdf
    • https://uploads.strikinglycdn.com/files/2001fd7b-20d1-4607-ab65-04d75bb048b5/maxi_cosi_pria_85_max_convertible_car_seat_nomad_sand.pdf
    • https://uploads.strikinglycdn.com/files/9f054b33-de19-442f-a9a1-557aa739ba55/32227050900.pdf
    • https://uploads.strikinglycdn.com/files/add0a594-20ec-43f9-b052-f552b1752200/dream_interpretation_dead_pet_alive.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_off0000f1c1.bin
16a816d284a128c9e591f9c1ee114f9519400181fa1038e92a1ddebd4971f353		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C1 5564 bytes
font_01_sfnt_off0001049c.bin
98e501740da285e2ab44564eb9662c6805aa0b17c37addfd1ae9cd80f1d82380		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1049C 10548 bytes

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