Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ccddf211ef1789…

MALICIOUS

PDF

77.1 KB Created: 2021-03-16 13:52:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d510324466cc376184b343e4645820d8 SHA-1: 1ce4b46b5102509eb8c6336fd1762937984f5a75 SHA-256: 60ccddf211ef178930a07198a1ff75a0425c60d4aeff1be9628cdeaccbab23c8
126 Risk Score

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 0.9949

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 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://kuzutuzo.ru/123?utm_term=intermediate+algebra+worksheets+pdf PDF link annotation
    • http://pofaduxiruk.getenjoyment.net/master_of_the_universe_castle_grayskull.pdfIn PDF document text
    • https://cdn.sqhk.co/walekikem/YhgEjhN/divudebigovu.pdfIn PDF document text
    • http://zereteleriw.getenjoyment.net/xcode_storyboard_tutorial_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/sovajepuxe/iBs0UEX/10421680792.pdfIn PDF document text
    • http://student-yurist.ru/76865562431zg8lq.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/9gdhgbr/xiwabusowijikeve.pdfIn PDF document text
    • http://reawolt.online/91032878682rgk4r.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/eihJLif/car_mechanic_simulator_2018_xbox_one_mods.pdfIn PDF document text
    • http://formblckr1.xyz/2019_ashrae_handbook_hvac_applicationik2a.pdfIn PDF document text
    • https://cdn.sqhk.co/balekunu/jzNcigm/tropico_6_switch_price.pdfIn PDF document text
    • http://nopawumakonip.22web.org/male_genitourinary_exam_template.pdfIn PDF document text
    • http://pimebujeben.66ghz.com/fidis.pdfIn PDF document text
    • http://ru-dev.xyz/58572732264zre5t.pdfIn PDF document text
    • http://losiruwu.66ghz.com/information_about_invention_of_telephone_in_marathi.pdfIn PDF document text
    • http://wugupomovupa.sportsontheweb.net/xefituluzomevewo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_78db8f2177954dcba5630a649dd93cac.pdf?index=trueIn PDF document text
    • http://xofogijatoli.epizy.com/printed_sheet_of_paper_crossword_clue.pdfIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_f7fb8cdbb4a749d8871fa07c7d784f08.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b6c11fa-df76-4f7c-a25d-0aa0918e81cc/jufagomaviv.pdfIn PDF document text
    • https://d8d691c7-cf48-432b-bece-a54604b57851.filesusr.com/ugd/1e3a4b_745f635134f34576ba4efa81a206308e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca9a8e34-e0a9-4b30-bf48-b77e54bdd875/rolusitedixasemukeforu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8175789f-38d5-4eac-bdaa-2b937057f520/42150687684.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08cd41eb-e894-480d-b5e3-d9a3ad342958/gaunts_ghosts_audiobook_free.pdfIn PDF document text
    • http://luzupofodofudo.epizy.com/thesis_proposal_template_doc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffdf3b44-34a8-4901-9513-356a31750cdc/what_are_the_six_aristotelian_elements_of_dramatic_form.pdfIn PDF document text
    • http://xunudijumo.myartsonline.com/biogeochemistry_of_a_forested_ecosystem.pdfIn PDF document text
    • https://47ab6ce1-aee6-4086-a8e7-31fe393d2411.filesusr.com/ugd/afbef4_9ac23754fb254df7b84f2d4ad034e9cc.pdf?index=trueIn PDF document text
    • http://besafetusupug.atwebpages.com/what_is_the_main_idea_of_the_play_antigone.pdfIn PDF document text
    • https://694dae7a-2033-4a59-8b06-91ff4eec0774.filesusr.com/ugd/e1d58f_38f20a67294d49bab28f63e29058752f.pdf?index=trueIn 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_off0000ed46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED46 5688 bytes
SHA-256: 085c0f751b8b2b3643c6ffb7ae6740ee3f8bb92ce993fee0ef32fcc3cf8a7a97
font_01_sfnt_off00010082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10082 11016 bytes
SHA-256: 66ca155dd9f6073764dd4707f704211ff18066e4a9f66148469d5e68a6b7fd3a