Malicious PDF — malware analysis report

Static analysis result for SHA-256 93f4d6decf9388ab…

MALICIOUS

PDF

80.6 KB Created: 2021-06-02 22:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5fa2015b031054399f8ee68e25223a41 SHA-1: e130d53013a88cbdc351bcfd2fe735bf380e82e6 SHA-256: 93f4d6decf9388ab058d0a8ecb49e9ef97c223a29847c88195ef5e0be4b5732c
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 0.9998

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://garglob.ru/pbw?utm_term=management+leading+%2526+collaborating+in+a+competitive+world+12th+edition+pdf PDF link annotation
    • https://gakutuzopekok.weebly.com/uploads/1/3/4/6/134605442/6768067.pdfIn PDF document text
    • https://lerinaxupol.weebly.com/uploads/1/3/4/6/134662503/633208.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369308/normal_60243b55bd2b8.pdfIn PDF document text
    • https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/rosasewuxid-zaxoluf-biket-busefise.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401558/normal_60003f9be6321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420034/normal_60243dc5e2523.pdfIn PDF document text
    • https://rabesala.weebly.com/uploads/1/3/5/3/135394244/99d2c68a.pdfIn PDF document text
    • https://rujogapojepon.weebly.com/uploads/1/3/4/5/134597846/36bfc37087825e0.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/227372f1-dc45-4aa5-8d4b-512fa2c5d766/what_temperature_does_it_feel_like_outside_right_now.pdfIn PDF document text
    • http://zegugas.pbworks.com/w/file/fetch/144411423/taboo_midnight_card_game_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e80d1985-2a0b-4d15-8273-fb723d3f3047/kittens_game_progression_guide.pdfIn PDF document text
    • http://bofamawetodo.pbworks.com/f/excel_community_medicine_12th_edition_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63178964-3074-450e-92f7-a8ea81b15948/2016_honda_civic_ex-t_service_schedule.pdfIn PDF document text
    • http://sewafebi.pbworks.com/w/file/fetch/144426303/alfabeto_para_imprimir_tamanho_grande_colorido.pdfIn PDF document text
    • http://zikasamu.pbworks.com/f/damifemanubi.pdfIn PDF document text
    • http://gazumadu.pbworks.com/w/file/fetch/144444318/wofefofuzurerosesab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c9d06a3-bfee-4778-9f2a-905a1e32e937/descale_keurig_2.0_without_vinegar.pdfIn PDF document text
    • http://fotikeralo.pbworks.com/w/file/fetch/144475641/muvoxibok.pdfIn PDF document text
    • http://savavaze.pbworks.com/w/file/fetch/144470985/transistor_configuration_download.pdfIn PDF document text
    • http://nunaruribeg.pbworks.com/w/file/fetch/144414924/strategy_guide_zelda_breath_of_the_wild.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_off0000fca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA3 4876 bytes
SHA-256: 7d5b08e5bf27b20c851b12eb5e30577b34951244c319c1923fa91a1265729d63
font_01_sfnt_off00010d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D35 11344 bytes
SHA-256: 2f97e9dcd6f978c9c55209834d09f711a81e0ec7ed26b4d897f44870e0dbc2c5

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