Malicious PDF — malware analysis report

Static analysis result for SHA-256 921d28dac186aa00…

MALICIOUS

PDF

78.3 KB Created: 2021-03-24 23:58:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2d7620a9d0e650d31445abf26ef80c59 SHA-1: f2f757131243516c28c222ac9d5e3140b0b1ebb3 SHA-256: 921d28dac186aa0037526173792f1d9a75d32a267858ff66312e1a880cc7cd3f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://jacksth.ru/strik?utm_term=how+do+i+connect+my+sony+camera+remote PDF link annotation
    • http://roxelejabojafe.scienceontheweb.net/reading_scales_worksheets_year_4_australia.pdfIn PDF document text
    • http://tufodudem.mypressonline.com/tutorowebizuduvukubikoxo.pdfIn PDF document text
    • http://gagefiwirimat.medianewsonline.com/xivufamezukipifevaxupived.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/75750109563.pdfIn PDF document text
    • http://tiserud.22web.org/66165525386.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423696/normal_6046a2a1e7d00.pdfIn PDF document text
    • http://keluzizizeroki.getenjoyment.net/tourism_business_environment.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489975/normal_5ff95e58a53d3.pdfIn PDF document text
    • http://ravigimojamel.mypressonline.com/breakthrough_thinking_from_inside_the_box.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://viniwowosur.onlinewebshop.net/dirk_gently_s_holistic_detective_agency_free.pdfIn PDF document text
    • https://b133b025-67d1-4190-9e53-fbb99503dec2.filesusr.com/ugd/caf13f_86e117aec5c147c5accbe67b51cab49b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/fudurolikatixepe.pdfIn PDF document text
    • http://romutipi.rf.gd/26240392602.pdfIn PDF document text
    • http://razanowonowut.rf.gd/busatamu.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/furegunigu.pdfIn PDF document text
    • http://lamumabazekutum.epizy.com/antibiotic_resistance_ielts_reading_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/latex_template_homework_math.pdfIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_9810d3b64e7d42ca86cdf6f5edbc2c07.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/jugizupunefugegolofovukif.pdfIn PDF document text
    • http://repajazofuwide.epizy.com/23470194228.pdfIn PDF document text
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_c1972832e19a45eb82c1972138d7d1a0.pdf?index=trueIn PDF document text
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_0fa6a9e0d615463f99264e5305f098ef.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C9 5208 bytes
SHA-256: d3d5a19903a33283716d8a53aca5599f49c56869b44d6c045d64982f3b645c54
font_01_sfnt_off0001067d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067D 10992 bytes
SHA-256: ad74f827a3c44b10f7145ba13f137a4867207e4e79fda25009b4f355a91ff476

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