Malicious PDF — malware analysis report

Static analysis result for SHA-256 b325fd534fdad9cd…

MALICIOUS

PDF

89.7 KB Created: 2021-03-16 06:59:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2feb65c344170f72a7a20de79a4156d5 SHA-1: 34013783558f1095b665f71192648df9160d4352 SHA-256: b325fd534fdad9cd8b0794e78c0d7aeee1bcdea1f26e9cce35d96cd7327550c8
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 0.9999

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://xezojetit.ru/wix?keyword=universal+sewing+machine+serial+numbers PDF link annotation
    • http://findattime.com/mevunerw9v8w.pdfIn PDF document text
    • http://biotringel.shop/mozart_divertimento_k_136_sheet_musickvstk.pdfIn PDF document text
    • http://pro-komp-master.website/what_is_meant_literature_review_in_scientific_researchjbqp2.pdfIn PDF document text
    • http://lunesygets.xyz/vw_transporter_t5_workshop_service__repair_manuallj245.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373240/normal_60154d53577ef.pdfIn PDF document text
    • http://vostokzapad.su/26776817991onkgt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385424/normal_5ff33fa47f021.pdfIn PDF document text
    • http://sebaxerazo.22web.org/55313565421.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461484/normal_5fecd4bba84b8.pdfIn PDF document text
    • http://afracheat1.xyz/rabonizeterxshh.pdfIn PDF document text
    • http://xofenejilomoz.iblogger.org/bixevomakige.pdfIn PDF document text
    • http://erogan24.website/rebadefavirejewakuzazjj2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484169/normal_60268b367e33a.pdfIn PDF document text
    • http://esclick.pro/88708215638ei8p6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vijamutekaga.rf.gd/daganewir.pdfIn PDF document text
    • http://lidumadinub.epizy.com/kingston_jamaica_price_burger_king_jamaica_menu_prices_2019.pdfIn PDF document text
    • http://pisepivowunasi.rf.gd/template_brochure_a5_photoshop.pdfIn PDF document text
    • http://wosoremozojofam.epizy.com/prioritisation_and_delegation_in_nursing.pdfIn PDF document text
    • http://rarobodosonul.rf.gd/gowiroxumomonomaveles.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_off000120a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A5 5496 bytes
SHA-256: 906b4e0901dc38f832eda1af8113b9505c4da4da9f21bc43bf075eafe315b94e
font_01_sfnt_off00013344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13344 11356 bytes
SHA-256: 1c4774aa92f124ce068291ede86469969b71a31314d2d6a4d76f7ffeba7e6013

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