Malicious PDF — malware analysis report

Static analysis result for SHA-256 cba9a3f1697cd0ce…

MALICIOUS

PDF

92.1 KB Created: 2021-03-24 04:44:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 30fe9ebee7714eec42d7e8e2576293e4 SHA-1: 102b01672e6f3185712e3f64c254730c161fd768 SHA-256: cba9a3f1697cd0ce9a034d1555255a9879ba81d272bff315efbaa9205e58bca2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://golowaki.ru/wix?keyword=autobiografia+de+un+yogui+pdf+en+espa%25C3%25B1ol PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496853/normal_60121fbf40544.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421330/normal_600c81ce89d09.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/fjdEhb0/ludo_king_online_game_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vubiwete/geidia7/super_cobra_jet_mustang_for_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458618/normal_5fe9c4fc44da6.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/gHOJynz/nabewe.pdfIn PDF document text
    • http://lorakuze.sportsontheweb.net/can_a_kindle_fire_battery_be_replaced.pdfIn PDF document text
    • http://wisatemubudu.medianewsonline.com/stack_on_10_gun_safe_key_lock.pdfIn PDF document text
    • http://busimaderule.mywebcommunity.org/ravaduzabivabu.pdfIn PDF document text
    • http://xapidomin.mywebcommunity.org/gezexanebugime.pdfIn PDF document text
    • http://romabeveseruzor.22web.org/23521916922.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/hlxjcjf/amaze_2018_ground_clearance.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481170/normal_5fcee958dbd2a.pdfIn PDF document text
    • https://cdn.sqhk.co/puwupasakej/gcicgf9/house_music_radio_stations_dublin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5b5cf7c4-d983-4e27-bd54-44d52fc9074e.filesusr.com/ugd/2f9450_ee2051ffe6b944888fbee938e79d1439.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/wenuvalepezowojamaxuza.pdfIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_1f0e7acd46044595a8041a1038c26b65.pdf?index=trueIn PDF document text
    • https://598a1783-db1d-4ebb-96f5-d3ad23e1e090.filesusr.com/ugd/ae99eb_81cd265fd5804a0890367deeeab7a0ec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mogedozara/fiddler_on_the_roof_movie_cast_now.pdfIn PDF document text
    • http://jabujiwotase.epizy.com/boss_day_card.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/countdown_timer_html_template_free.pdfIn PDF document text
    • http://mixezized.myartsonline.com/biology_book_for_class_11_sindh_board_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/bhagam_bhag_movie_720p.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12497 5652 bytes
SHA-256: e1f85800c1c0435898aceeac98e57ba517e01f55550d3127b74abb042cbd0ab5
font_01_sfnt_off000137ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137AB 12748 bytes
SHA-256: 142e3b8db72064e0192361d39abc7531cfd63e8de426bc20476f605f6f709f2d

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