Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b39dcfa452b6617…

MALICIOUS

PDF

72.9 KB Created: 2021-06-06 03:31:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fce08be50fb322f2f19cf6e408db4ad1 SHA-1: 113e3ba1f32f41bf2053ed72fe39297b22b9b978 SHA-256: 8b39dcfa452b6617a6490c2333bc251aebdcbd5bdcb7c6113b1fba09f8b0cf9e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

Heuristics 6

  • 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 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://garglob.ru/pbw?utm_term=persona+5+royal+how+to+create+satanael PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501198/normal_602be696bbdd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454421/normal_6023f7e091b85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418197/normal_5fd133efaf7bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377391/normal_6020b6e270fa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5fd1c65fcbbac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404512/normal_5fef142db0daa.pdfIn PDF document text
    • https://popoxalisasuper.weebly.com/uploads/1/3/0/7/130775362/43fb2b61.pdfIn PDF document text
    • https://palajuwasodix.weebly.com/uploads/1/3/2/8/132815908/notiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jeselivid.pbworks.com/f/papas_donuteria_unblocked_games_77.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/674acb1d-45cc-4f1a-bd18-c6db5159e4d2/46121156697.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75b26494-6ddc-4d8f-bf0e-59bd59afbc30/rojosukatuzovurusiwojo.pdfIn PDF document text
    • http://xorunezagu.pbworks.com/f/70970436974.pdfIn PDF document text
    • http://mefijunov.pbworks.com/f/zulenumelopiwugugorosom.pdfIn PDF document text
    • http://fixulirulafa.pbworks.com/f/nuzanubaxusiveli.pdfIn PDF document text
    • http://sawanixum.pbworks.com/w/file/fetch/144510516/the_future_of_the_mind_book_free_download.pdfIn PDF document text
    • http://kiletejude.pbworks.com/f/80034247811.pdfIn PDF document text
    • http://jifosez.pbworks.com/f/baxemipikivenapijuje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/325a150e-e304-4762-a60e-563395b2f3b3/rabumidewos.pdfIn PDF document text
    • http://kiwuwas.pbworks.com/w/file/fetch/144681405/wavepad_sound_editor_registration_code_2021.pdfIn PDF document text
    • http://wixugigir.pbworks.com/f/32056927732.pdfIn PDF document text
    • http://xalanupuzewo.pbworks.com/w/file/fetch/144596814/sasuwumuvimivotumusukawo.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_off0000dfda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDA 5204 bytes
SHA-256: 567c867a00c109be9eadfbdaee3b869aa127d8f927da197fcc8bf3d0f33c882d
font_01_sfnt_off0000f19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19E 10816 bytes
SHA-256: 1c00c713931dc68120369ff5f80972b1359d6b8993cbcc36b734f35e24995d8d

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