Malicious PDF — malware analysis report

Static analysis result for SHA-256 93dcad1e6f2cf301…

MALICIOUS

PDF

80.5 KB Created: 2021-04-30 18:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b5d7eb8786778aa1843ee808fcfa031e SHA-1: 12238ae9b791d87a672b8f806cb8359b4c2adaa7 SHA-256: 93dcad1e6f2cf3010fd37097dfcc916996f8e8820c48e0d797d911502e8152c8
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 0.9990

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://baarspo.ru/strik?utm_term=why+is+my+bluetooth+headphones+not+charging PDF link annotation
    • https://cdn.sqhk.co/senuziker/ieEiegg/mars_2020_arrival.pdfIn PDF document text
    • http://demuxum.getenjoyment.net/92689258202.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/cYvhgjd/jakawal.pdfIn PDF document text
    • http://zulesaxeririv.sportsontheweb.net/self_appraisal_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/xufatirumina/TbDMwDo/22592095918.pdfIn PDF document text
    • http://gepokupaburorew.mywebcommunity.org/bbc_compacta_class_11_english_solutions.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/gcJHhjY/raspberry_jam_recipe_without_pectin_uk.pdfIn PDF document text
    • http://kijofizovurisos.medianewsonline.com/employment_news_october.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/ghRhfid/infusoria_culture.pdfIn PDF document text
    • https://cdn.sqhk.co/bijukipuj/jijexje/vax_carpet_washer_black_friday_deals.pdfIn PDF document text
    • http://vurujupafowutox.mypressonline.com/bigenixoda.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/HhjeifO/samurai_swords_shogun_board_game.pdfIn PDF document text
    • https://cdn.sqhk.co/fotenulutis/eif4haJ/zelilanuk.pdfIn PDF document text
    • http://dapujabowigu.sportsontheweb.net/mizebiwupap.pdfIn PDF document text
    • https://cdn.sqhk.co/zizenozi/jbmYqjW/44326820099.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/zavaxegepogu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f7cff54-c4b7-4b65-afd1-92359e25c01d/draconomicon_dd_3.5_ita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ea8d60f-b3df-45c6-b3d3-e3c3cf8110eb/56868235088.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db9e6733-846a-4701-8c10-f74c0c2a236e/75459256655.pdfIn PDF document text
    • http://jujobope.atwebpages.com/rarowuwalo.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/pathology_mcq_books_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/22055801803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/952b1134-8891-4d54-8d5a-331ddf4ff9ac/free_9_11_images_for_facebook.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/25077089026.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/58046139426.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_off0000e61d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61D 5744 bytes
SHA-256: 7326c9619907a2582b767899d775e520b728f59769f3ba1f9964d3509ee84d09
font_01_sfnt_off0000f98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98D 10572 bytes
SHA-256: c2160af812f45bf9c9d48f964019205ef6f0a182af7df75b561da5ee5a7b8cee
font_02_sfnt_off00011e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E03 16320 bytes
SHA-256: 1fc45ffb276bc0ed432a2ee8557dc1c00bbf2a452b59535034eda65dd5597ea3