Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ed1af886e3af9b…

MALICIOUS

PDF

80.6 KB Created: 2021-03-25 13:22:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: adce9ef32b9ac6a462f91a2dd8bc3580 SHA-1: 921a5cdd26784fc5fb2df96d2be8fa6cede0ae6d SHA-256: e6ed1af886e3af9b15e7bfdaf921bedd6a4a48944eeca18b99b14c31e1199b08
186 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 0.9990

Heuristics 6

  • 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 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.
  • 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://nipisod.ru/award?keyword=philadelphia+trolley+map+pdf PDF link annotation
    • https://cdn.sqhk.co/dujagazatad/jjhbMtk/anti_aircraft_artillery.pdfIn PDF document text
    • http://dupamineni.medianewsonline.com/comment_fusionner_des_avec_adobe_reader_x.pdfIn PDF document text
    • https://cdn.sqhk.co/lawipavoso/NIPjghd/81175155567.pdfIn PDF document text
    • http://zarewubizeno.mywebcommunity.org/cantigas_de_maldizer.pdfIn PDF document text
    • http://mixezitubut.mygamesonline.org/faminapesere.pdfIn PDF document text
    • http://limezage.scienceontheweb.net/advanced_bash_scripting_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/hbhahjC/words_in_a_picture_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/UheGmK2/t_mobile_family_mode_app_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_7257e02e26004fdc96359713f6243a28.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/adnan_oktar_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a53ddc0-783a-417f-b715-e1cc0507fb5f/yaesu_ft-2900_programming.pdfIn PDF document text
    • https://167c8e7b-8160-49a2-a88e-f26749d647c8.filesusr.com/ugd/1ad47d_cc0dd7d812dc4724838ac6a919c28d85.pdf?index=trueIn PDF document text
    • https://8c1dc56a-a131-4b43-acff-3635b9115217.filesusr.com/ugd/90423f_fa956e60284b48cbb283c401af63a650.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e93ec8d-6b12-4094-8115-02a818dee354/68430276271.pdfIn PDF document text
    • https://336ddc11-c37d-4cd6-9685-7accad2975f7.filesusr.com/ugd/479fa9_7786909f437e4c30b8fb3c0142b07aad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/difference_between_ai_and_machine_learning_quora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61a178a2-d6f5-4a5a-a5bd-002bbde4398c/how_to_workout_with_barbells.pdfIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_96b61f20a62743d0950bed83fdf6954d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/yachting_salary_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f377d15-011e-4773-8c59-3f1b739ebf5a/76123757264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aa66e1b-a8a6-4978-bff4-76a6eed2de9a/forklift_training_cost_scotland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7213d946-48ad-422d-976b-8f2f05abbf23/what_is_the_difference_between_ralph_lauren_labels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45f7a8cf-6e92-4192-b446-0edb949d37e0/moxidazekosapeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1e90243-d666-4f36-aee9-8cc97edbb8fb/the_chronicles_of_narnia_prince_caspian_castle_raid.pdfIn PDF document text
    • http://zonafikepejese.onlinewebshop.net/breaches_of_the_bone_belfry.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE73 4888 bytes
SHA-256: 8d4f094e7773d50eafc5d857c190d68b881ff1d67477d6ed656ef91c2d372fc0
font_01_sfnt_off0000ff16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF16 11376 bytes
SHA-256: 73cfdc77d3d23cc603d6e90dcc025934ab05b5e4be088e57a4eb5cdaf9f23dce
font_02_sfnt_off00012640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12640 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34