Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf1a3c4ea7e718c…

MALICIOUS

PDF

68.6 KB Created: 2021-03-08 15:02:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 1da49b4c80840109265f608633c22250 SHA-1: 4c59f44a046649b8571d679ed0d44e22f51d33b8 SHA-256: cdf1a3c4ea7e718cabb0eec2b4bc3461411798830b02cac08b841ed107758211
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 phishing content. The document body, though heavily obfuscated, appears to be a lure related to product installation, directing users to a URL that likely hosts a phishing page or further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wb?keyword=how%20to%20install%20deadcat%20rode%20videomic%20pro PDF link annotation
    • https://cdn.sqhk.co/vumulevezuf/iejbvo5/wapexoberobisogamig.pdfIn PDF document text
    • http://gegapaxibu.22web.org/platicas_prebautismales_san_cristobal_merida_2019.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/15552378296.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378620/normal_603a16b41dc74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495841/normal_60410fe1da986.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407810/normal_6007b187e8845.pdfIn PDF document text
    • http://zofanelo.22web.org/acordes_de_la_cancion_el_poder_de_la_oracion.pdfIn PDF document text
    • http://nomevufaneboja.mypressonline.com/13926066972.pdfIn PDF document text
    • http://sigevomub.22web.org/what_is_the_main_idea_of_this_cartoon_from_watergate_era.pdfIn PDF document text
    • http://rawoferifexa.22web.org/look_whos_back_trailer_deutsch.pdfIn PDF document text
    • http://ponopawux.iblogger.org/woxubafixexavorunoxe.pdfIn PDF document text
    • http://viputixezererej.66ghz.com/apc_ups_software_free.pdfIn PDF document text
    • https://cdn.sqhk.co/runetonorox/Clvgcht/free_online_games_no_download_required.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sipesunerep.epizy.com/apache_openoffice_calc_guide.pdfIn PDF document text
    • http://zexizel.epizy.com/96751031177.pdfIn PDF document text
    • http://radiviwix.onlinewebshop.net/john_deere_1830_tractor_for_sale_ontario.pdfIn PDF document text
    • http://makakanow.onlinewebshop.net/how_to_fix_a_maytag_washer_that_will_not_spin.pdfIn PDF document text
    • http://gubawakelu.onlinewebshop.net/texeriki.pdfIn PDF document text
    • http://juvadapirepaf.epizy.com/brother_printer_hl-_1110.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_off0000ce42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE42 5332 bytes
SHA-256: 34c22978705ff5b1af2b020a276d8f836e29f66f99994efd98724f2fb9d509af
font_01_sfnt_off0000e065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE065 10736 bytes
SHA-256: 9e2b8699b4197aee589b22c17fd5f461df8de824d27d0cd3afb1cfe92dd3b96b

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