Malicious PDF — malware analysis report

Static analysis result for SHA-256 2daa75eae7a9d2e6…

MALICIOUS

PDF

75.6 KB Created: 2021-06-10 09:34:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4e23631f2c7cca6cc0243b14eaf807fd SHA-1: 0588cb8dba2f37adefbbe1694db70eec854c818d SHA-256: 2daa75eae7a9d2e63438c2272120774a70d16a4eece44872fb43a309c159d647
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to various external websites under the guise of providing downloads for films and software hacks. The presence of numerous external links, some hosted on disposable domains and utilizing UTM parameters, strongly suggests a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://crysiq.ru/pbw?utm_term=download+film+dear+nathan+lk21 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379960/normal_604117b7953c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393626/normal_600a6501de519.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406497/normal_60bd06a6a4dca.pdfIn PDF document text
    • https://leximefowa.weebly.com/uploads/1/3/2/6/132680903/tibevomi.pdfIn PDF document text
    • https://xugubevowasisof.weebly.com/uploads/1/3/4/8/134885616/riwovaja-zexegopajapiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393761/normal_604a4f38c66c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497356/normal_600a058b8445a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470703/normal_6056eca7c13fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481540/normal_5fe52e908817f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381541/normal_606df1a869440.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bibosopimugo.pbworks.com/w/file/fetch/145010637/pubg_hack_app_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ca2b535-9029-4050-b422-b26bc2de9ec1/d_link_dsl_2730u_configuration_mtnl_broadband.pdfIn PDF document text
    • http://zizovitunex.pbworks.com/w/file/fetch/144602454/how_much_are_black_and_tan_coonhound_puppies.pdfIn PDF document text
    • http://fozujedax.pbworks.com/w/file/fetch/144895746/pufabolemimifaziviwuviv.pdfIn PDF document text
    • http://disisopaz.pbworks.com/f/avast_internet_security_2018_license_key_till_2023.pdfIn PDF document text
    • http://dajodovilav.pbworks.com/w/file/fetch/145003716/who_is_the_worlds_richest_family.pdfIn PDF document text
    • http://mitamugukojo.pbworks.com/f/vekelob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf207742-3632-4705-afa8-88f38cc6e4de/lijikobeso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a38d1114-add9-4e05-939a-ea58974ef85f/sexotaguzozal.pdfIn PDF document text
    • http://kukumepubop.pbworks.com/f/fedex_store_hours.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa4347ef-6375-45b7-890e-f9a7406be921/sifaxuxedosapimetev.pdfIn PDF document text
    • http://pobonagul.pbworks.com/f/how_to_reset_service_tire_monitor_system_on_chevy_cruze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/896ddc78-a6c3-4557-9166-a8a94c489f5a/read_stephen_king_rage_online.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_off0000e721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE721 5308 bytes
SHA-256: 8e7e09ca927b12d46afdff65430da05760d0a3416678d86504634b823a13c818
font_01_sfnt_off0000f925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF925 11292 bytes
SHA-256: 03bb034ca8d759541486ad46406ce33291eb795d1b4b5e14bb9eb0f3c9973da6