Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce5b7d3298f7c6a…

MALICIOUS

PDF

142.8 KB Created: 2021-05-04 00:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 668a5d2cdd8052f297b21f627accc5ab SHA-1: 59e2f8da9463a9076779fe24d95d5785a47fe8f4 SHA-256: cce5b7d3298f7c6a5cbac8f8e6e84b838c9b3b67f01b7219b1cd9cb7886ae13b
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and heuristic analysis indicates it's a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://golowaki.ru/strik?utm_term=swg+how+to+grind+everything PDF link annotation
    • http://boldly-grow.com/76526637455ihut8.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/ghihljb/kasafutibe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382948/normal_603fd4d7a623d.pdfIn PDF document text
    • http://vuroxinizona.scienceontheweb.net/77822959870.pdfIn PDF document text
    • https://cdn.sqhk.co/zapusukajev/jiiiieK/lenokevetimavajop.pdfIn PDF document text
    • http://rijebipimaba.getenjoyment.net/the_annales_school_an_intellectual_history.pdfIn PDF document text
    • http://tibudirowe.mygamesonline.org/apes_book.pdfIn PDF document text
    • http://magic-spring.com/dds_discount_jobs_bakersfield_ca3qq9p.pdfIn PDF document text
    • http://bimoriz.getenjoyment.net/15500998689.pdfIn PDF document text
    • http://medway24.com/78978043721s7pny.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491723/normal_602fceead3e04.pdfIn PDF document text
    • http://jilet2.club/dell_precision_t7500_specs96n35.pdfIn PDF document text
    • https://cdn.sqhk.co/vekosozob/jj2pjcz/15409201350.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/hihiuia/wevewa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484821/normal_5fe059d01bfe1.pdfIn PDF document text
    • https://cdn.sqhk.co/digijodaga/hhia9dx/fikepuxeson.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/turn_off_stability_control_jeep_jk.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/a5d1bad6-23fd-4df2-baf1-7264894dda33/is_dominos_philly_cheese_steak_pizza_good.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/sheet_music_maker_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11a8998a-365e-4117-9ab8-e529e0710c40/yaesu_ft-897_service_menu__internal_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba0b7e64-b145-42aa-a49f-16ac5b4a611f/design_patterns_in_java_best_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf4419fa-b4c6-4202-8731-79340db1b960/aa_raleigh_nc.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/61216781978.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eb5199c-1784-4c9c-898d-41bf9d713bfc/assassins_creed_origins_prima_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/sukagunesapufirituzesogu.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_off0001f27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F27C 5024 bytes
SHA-256: bfe3af5d97f86078bf485dccdabb1da40c9c16fe627067d1e8c504d5576bb267
font_01_sfnt_off000203ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x203AC 12284 bytes
SHA-256: 0e7998669fb69eebf6745485c9acdd7f31a8ceba4a8c4919ea5f62aed0c4a8f7