Malicious PDF — malware analysis report

Static analysis result for SHA-256 624ce10cea40a510…

MALICIOUS

PDF

75.1 KB Created: 2021-03-25 22:49:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ed7ce7ebab884495d8454f238bef14f9 SHA-1: 4ea47442853ee03d15bc3b705bfef6aae1efe4a5 SHA-256: 624ce10cea40a510fa012332c5455943586f91dd6f7fc73c5b9bb59ade33cc00
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are part of a link farm designed to direct users to external sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, and the presence of 'PDF_URI' and 'EMBEDDED_URL' firings confirm external resource engagement. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/wix?keyword=power+dome+ex+manual PDF link annotation
    • http://tevituvodejifep.mywebcommunity.org/office_365_administration_inside_out.pdfIn PDF document text
    • http://volalagokiva.sportsontheweb.net/astm_b117_11.pdfIn PDF document text
    • https://bejixetixozivi.weebly.com/uploads/1/3/4/4/134499198/f9c11566cd.pdfIn PDF document text
    • https://sazekunoteti.weebly.com/uploads/1/3/2/7/132740187/volezulowasifi-nexexotukabe-xikenu-kuxujavogejefar.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/lefemijip/checkmarx_8._8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/243e26a9-1014-402a-8e24-ff852d1d4373/what_should_i_name_my_white_girl_dog.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/sat_practice_khan_academy.pdfIn PDF document text
    • https://55afd15b-9a96-48ff-beb6-d705f4765584.filesusr.com/ugd/8b06a9_6c9b291afd2d45ddb06dde60a55c6db5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/781cb60d-1112-4d9c-a457-70e777becaa7/77844854581.pdfIn PDF document text
    • https://e0f910ba-f4aa-4d6b-87f6-24d78cda99ab.filesusr.com/ugd/cc15ef_fd88b15092b74f17b8ae68d573de277e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/how_to_get_certified_iso_27001.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/73459192526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f35333d8-8545-4269-8940-f0f241ea6a7e/josameb.pdfIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_82c9fa52ed484d5997e70328d407de46.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dupula/gta_vice_city_game_cheat_app.pdfIn PDF document text
    • https://e1318bff-d970-45e2-bcea-45481503a18b.filesusr.com/ugd/75a96d_3650dc5c632b4b718f2d5fe167ccb59e.pdf?index=trueIn PDF document text
    • http://jumepenitujox.atwebpages.com/sukur.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/do_you_have_to_pass_parallel_parking_to_get_your_license_in_georgia.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/functional_strength_workout_at_home.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd91dec-72bf-484b-98e0-bd88739f26b5/how_to_improve_hoover_suction.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_off0000eb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB06 4952 bytes
SHA-256: 9963adeb25a93758c0d73e7def1befca00a668cff7137c5f82f96493c898544b
font_01_sfnt_off0000fbd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD9 10576 bytes
SHA-256: 3754448f098200319871cac7f7ffd5209ea246c1f2e6bbd7d5d17097daaf5812

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