Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd0ab10e7636224…

MALICIOUS

PDF

77.6 KB Created: 2021-03-30 17:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bbaf51ebd56b565eac75eee57e5301e0 SHA-1: 9faf0751da91441aeafd5fd751413503d07b6e8b SHA-256: 5cd0ab10e76362247196ff694c9dbe45d69495f824bd71111a442c024cf35d79
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 0.9995

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://jottigo.ru/award?keyword=deadpool+kills+the+marvel+universe+1+4+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372100/normal_603c89407853d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484107/normal_60274a5e04729.pdfIn PDF document text
    • http://gubixazolela.sportsontheweb.net/fisovotitugosupus.pdfIn PDF document text
    • http://naxiramomamaz.66ghz.com/adhyaksha_in_america_movie.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390643/normal_5fde4edea0a98.pdfIn PDF document text
    • http://danoguvokapijof.medianewsonline.com/59046970510.pdfIn PDF document text
    • http://lorakuze.sportsontheweb.net/hp_p2035_service_manual.pdfIn PDF document text
    • http://lonemap.medianewsonline.com/batutozatefodu.pdfIn PDF document text
    • http://tanemazijafawin.medianewsonline.com/37061092649.pdfIn PDF document text
    • http://xetorobexojukas.22web.org/zibet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376105/normal_603889ab0b292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481065/normal_602b90fd441bf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zubiluwetij.myartsonline.com/python_programming_book_in_hindi.pdfIn PDF document text
    • http://vigexosav.myartsonline.com/98555444053.pdfIn PDF document text
    • http://nixomirorubu.myartsonline.com/rujibodos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffcf99fc-fdd3-4dee-aa17-ee8241735df6/warcraft_3_reign_of_chaos_vs_frozen_throne.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3955850a-fc4d-4c9b-bdb1-70f889946dec/who_is_the_protagonist_and_antagonist_in_everyday_use.pdfIn PDF document text
    • http://lopaxejip.rf.gd/amc_10b_2020_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01c60f0c-7bd1-40f2-ba02-e765902f1147/why_is_my_hp_deskjet_2540_not_printing_properly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/058daf74-ff6e-4213-85af-456a648fa2de/how_to_get_engineering_job_with_no_experience.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10e0464b-f6ee-4de0-aaff-e59f42d82470/33439261681.pdfIn PDF document text
    • http://belibivizonojo.myartsonline.com/online_editor_add_pages.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_off0000e134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE134 5544 bytes
SHA-256: ae2cd0df1c0e169a539840d91e55f7d05634e46d90d38d731e7ad259558b2cb8
font_01_sfnt_off0000f3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FD 16200 bytes
SHA-256: 33e2591ef6133f6723615709da49b7589e989350561b70de1d0e86fa924e6895

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