Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2dad7a3e05bb328…

MALICIOUS

PDF

77.5 KB Created: 2021-03-10 05:04:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e942227e9d51bb7519419a691ce8d55c SHA-1: 53e37968e2ae059c67ef25a6ce7302101290867b SHA-256: e2dad7a3e05bb32810e0b3cf1f2b6969145a864d51694eddcf4378808fe6c9cf
156 Risk Score

Malware Insights

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

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 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/aws?utm_term=fishing+knot+guide+printable PDF link annotation
    • https://cdn.sqhk.co/surikuzezun/gH8yXN7/super_mario_bros_arcade_mame_rom.pdfIn PDF document text
    • https://cdn.sqhk.co/timadupak/haid1qj/thrifty_car_rental_airport.pdfIn PDF document text
    • https://cdn.sqhk.co/woluzadeviv/jdgiihl/fejugotemufudixagilakuz.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/S1Degce/medieval_idle_tycoon_idle_clicker_tycoon_game.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/ih5nhfW/28516254963.pdfIn PDF document text
    • https://cdn.sqhk.co/zukasedu/hijgejh/8138513660.pdfIn PDF document text
    • https://cdn.sqhk.co/xurawupo/LieM8ji/mountain_car_drive_game_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/aGeifij/kunapawu.pdfIn PDF document text
    • https://cdn.sqhk.co/denirinodo/VDfidoZ/word_cloud_generator_like_wordle.pdfIn PDF document text
    • https://cdn.sqhk.co/rasetiwulipu/cqgcXAt/snappy_lube_oil_change_price.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vokeri/mafamamutogefedomatike.pdfIn PDF document text
    • https://926da24b-d3df-4aea-ac1b-ebdf7359a9e7.filesusr.com/ugd/fef925_d2c590b64f324ccf997dcf93ae3f8cf5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/halo_ghosts_of_onyx_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/bbc_radio_4_any_questions_any_answers.pdfIn PDF document text
    • https://113c517c-d7b0-4b36-99d7-6722bcb7ef36.filesusr.com/ugd/8e66a5_dd1569689c50493a899dbe4428902597.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/54954317876.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/2645697421.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/zuligojifakowawibafowezow.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/71757730481.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/bubbleupnp_apk_license.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/regenabopuzavowubokanugu.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/mac_os_bildschirmfoto_als.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE80 5380 bytes
SHA-256: cd83f99419da2933f2b989db7068c015f834ef2a82e26284e7d91c65ebef15cf
font_01_sfnt_off0000f0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BB 10124 bytes
SHA-256: b71c8dae7ee23640adecad39cae5c26e6a2e4eaf622e233e679d2e55845741df
font_02_sfnt_off000113a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A8 16028 bytes
SHA-256: 8345d1cc2b6b461b856d0454e2cf67edf5851291b6d0ebf21a7da0c9813a2b7f

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