Malicious PDF — malware analysis report

Static analysis result for SHA-256 c296bd87e5f6e447…

MALICIOUS

PDF

83.5 KB Created: 2021-02-28 20:43:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3214a3ae262dd484f894651a9a660e47 SHA-1: 9b625710e4cda39b3fecdf59e1512c51bd3c7f64 SHA-256: c296bd87e5f6e4477c55f1ab376a8c32b240a28faf5874eb4e1357c22c7d0e57
126 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 0.9998

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://jumiwimov.ru/strik?utm_term=how+to+stop+kidde+alarm+from+chirping PDF link annotation
    • http://tawesukosipot.22web.org/honda_rancher_350_carburetor_vacuum_diagram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468550/normal_6010ee637179f.pdfIn PDF document text
    • http://bibopasaxuvibu.mypressonline.com/how_to_read_sewing_needle_sizes.pdfIn PDF document text
    • http://varofaxuf.22web.org/the_pact_keeper_isaac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379476/normal_5ffcf90835b24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408997/normal_6016c6e92f693.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/4425879053.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_60209398c444f.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/how_to_find_the_age_of_a_reliance_water_heater.pdfIn PDF document text
    • http://fanexaxujuto.22web.org/87551083180.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/how_much_can_a_pallet_jack_lift.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458431/normal_600b930df11ea.pdfIn PDF document text
    • http://xuxijosut.sportsontheweb.net/tebawabogigifikule.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://witosef.rf.gd/13289502809.pdfIn PDF document text
    • http://notufexunu.rf.gd/82301352814.pdfIn PDF document text
    • http://delixerilebuk.epizy.com/18659987158.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/can_you_open_carry_an_ar_15_in_virginia.pdfIn PDF document text
    • http://jepameji.rf.gd/boot_camp_2008_movie.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_off00010893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10893 5684 bytes
SHA-256: 3b64e3ff19c5f229f22952770ce3ad1cba4677d6726f70e46c90a0404aa1646c
font_01_sfnt_off00011bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD3 10720 bytes
SHA-256: 14aa6c1074505fd51ace851e072ef6f26d7f025211aab5d39476b782eb1250ea

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