Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd17b4e6290c3392…

MALICIOUS

PDF

87.2 KB Created: 2021-03-26 08:47:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6189ef534d3ec8e39a02470c59399d81 SHA-1: 547f354711d063acf182ad7a95c2cae443672c84 SHA-256: fd17b4e6290c339248ccbd8ad5763e28849e4ff772b37db8460e3614d8e9dafb
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 0.9991

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://jumiwimov.ru/strik?utm_term=marine+safety+center+technical+notes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406516/normal_601bcf50bee6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376096/normal_60567328a594e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379054/normal_60407572b52fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447270/normal_603ce402b26f6.pdfIn PDF document text
    • http://jomirilut.iblogger.org/remington_electric_saw_chain.pdfIn PDF document text
    • http://lizetadolanut.iblogger.org/texef.pdfIn PDF document text
    • http://pixilapusir.22web.org/pegiruwozutusudokofup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8964868a-aef6-4da0-9a9b-29de7c28e0c5.filesusr.com/ugd/b910ae_dd6a1692c72549f89ed3bb119e30b145.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xeponodij/zusewezaxusarava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbe40990-00f9-4bfb-af3d-feba059c9696/17244018084.pdfIn PDF document text
    • http://magelul.epizy.com/bill_cosby_show_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/5_styles_of_resolving_conflict.pdfIn PDF document text
    • http://rebivik.epizy.com/bodubefuxerudipopanib.pdfIn PDF document text
    • http://wuwopeluba.epizy.com/what_makes_a_good_logic_model.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/uc_browser_win_7_32_bit.pdfIn PDF document text
    • http://falalovoxiwada.epizy.com/94591406306.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/58758069011.pdfIn PDF document text
    • http://kebafitesulodu.epizy.com/42711101076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87fa87f0-d075-4232-b152-b6fef15b4f10/gas_dynamics_john_and_keith_3rd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e3a97ad-6af7-49ef-813c-ad0d7f9ef8b0/82990243682.pdfIn PDF document text
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_d8f0df1d999544d99aeb277c57cfc06c.pdf?index=trueIn PDF document text
    • http://simivejed.rf.gd/70256464863.pdfIn PDF document text
    • http://zirivog.rf.gd/jukegovu.pdfIn PDF document text
    • https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_cbe65ebefdfd44cf889aca223ed361f5.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E2 5076 bytes
SHA-256: a9d0ac803d663a5064e474d044649986dfc31cdbdb5a86896f9a05d4ae82b29d
font_01_sfnt_off00012836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12836 11344 bytes
SHA-256: 92c33a0baab053ec6f0c32319fcfa9290e306627ba723fca651500cc1d0ea07e

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