Malicious PDF — malware analysis report

Static analysis result for SHA-256 065141e2e00ac9a5…

MALICIOUS

PDF

75.3 KB Created: 2021-02-17 16:40:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1a0d74c4eaa727d03421f9a0d96746c2 SHA-1: 5beaecfa596048c4634dfb331e9fa38782c632ca SHA-256: 065141e2e00ac9a5c38c6d9a0be8ec6fdc516fad451ef91e5cd7ad5b4e7c536c
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://leonvi.ru/123?utm_term=smart+will+review PDF link annotation
    • http://cleaner-inn.club/junipurobodiwamut49qv4.pdfIn PDF document text
    • http://homearfes.com/lurofitazefase7j0i.pdfIn PDF document text
    • http://pressit.space/pasos_para_realizar_una_misa_catolicaxv9ik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390350/normal_5fdc4f20af690.pdfIn PDF document text
    • http://maewallace.com/64001361010cn68h.pdfIn PDF document text
    • http://bogplaktnc.fun/poregidegeka7tc9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428039/normal_5fdd6c19637cb.pdfIn PDF document text
    • http://kyukty68.xyz/36671936252mx25z.pdfIn PDF document text
    • https://lolorude.weebly.com/uploads/1/3/0/7/130775760/7102676.pdfIn PDF document text
    • http://remontlegko.info/zebosoxusalezevugab08bcy.pdfIn PDF document text
    • https://cdn.sqhk.co/zalopubid/9jHjbie/zibojixipan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445125/normal_6011a87575444.pdfIn PDF document text
    • https://fefefilax.weebly.com/uploads/1/3/2/7/132712664/sigijamofiporunemur.pdfIn PDF document text
    • http://distornyup.site/texas_longhorns_ncaa_basketball9t389.pdfIn PDF document text
    • https://cdn.sqhk.co/kewukapugino/dNgif0q/kodiak_cakes_instructions.pdfIn PDF document text
    • http://bit-ipo.ru/executioner_s_chariot_guidezzve1.pdfIn PDF document text
    • https://tivufele.weebly.com/uploads/1/3/4/6/134615601/safifesufix_wetosilil_mufunodepa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390684/normal_60074ddad1abb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zitejilid.epizy.com/file_manager_apk_cracked.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_off0000e91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91B 4908 bytes
SHA-256: 2fee3da2d67deb21d4223e83635259ef6ee21271911cd056c0102ea5e6830020
font_01_sfnt_off0000f9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C8 11376 bytes
SHA-256: f4c9792193607b7f234aca38c41b43504f2c82bc9e4ea21862404359a0f9ed7d

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