Malicious PDF — malware analysis report

Static analysis result for SHA-256 be32365c5fc2af62…

MALICIOUS

PDF

89.7 KB Created: 2021-04-01 02:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 16b590c467920588bdfac9a36a3698d3 SHA-1: 98bd45732c757492b96998475e926c94bc1ffb00 SHA-256: be32365c5fc2af620f808a8846809521fcacc8418168ec4a89648c8d21450dbe
186 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 0.9992

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/wix?keyword=ap+government+chapter+13+the+presidency+outline PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4461205/normal_5fceb84566b3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_601873c9578e4.pdfIn PDF document text
    • http://purpless.vip/1891683038361dnk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500887/normal_6012a265897b5.pdfIn PDF document text
    • https://cdn.sqhk.co/tinupolureg/ggfsgc4/cross_the_road_jokes.pdfIn PDF document text
    • http://zivozariwusa.22web.org/33251051221.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485443/normal_605a4cbc5f2b0.pdfIn PDF document text
    • http://jetavimazi.22web.org/google_docs_contact_list_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387218/normal_604a7c96ebfab.pdfIn PDF document text
    • http://pravagims.net/abacus_maths_level_2_worksheetsuaab6.pdfIn PDF document text
    • http://kenujuzuba.22web.org/joomla_3_templates_responsive_free.pdfIn PDF document text
    • http://negozio50sconto.info/buteforewewuki4cckt.pdfIn PDF document text
    • http://cparta.moscow/79820910823o70o1.pdfIn PDF document text
    • https://cdn.sqhk.co/darojopul/gd78HB1/angry_anaconda_snake_simulator.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402956/normal_5fe464c8318c0.pdfIn PDF document text
    • https://cdn.sqhk.co/supopareso/hg6ipjj/ctet_question_paper_1_2011_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411480/normal_600a0a1af196e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457573/normal_5fd627d12a86a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_7eb75d8a0af143879afba867b7bcab87.pdf?index=trueIn PDF document text
    • http://xizisot.epizy.com/81160259377.pdfIn PDF document text
    • https://504706c9-3a86-45eb-876a-6494ef133fff.filesusr.com/ugd/80c1db_ff5629080992406a851e0bdff8c4ee6e.pdf?index=trueIn PDF document text
    • https://47c72a08-70a9-45d1-8a19-5db83ad17548.filesusr.com/ugd/f84671_a89b78dc9c514401b6cd6bc8a91fe347.pdf?index=trueIn PDF document text
    • http://suvubojetixag.epizy.com/basowekokusemuluje.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_off00011d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8E 5856 bytes
SHA-256: cb4801acc29a2f734818591de92f7d95f4f227ca6ffe8864591d0de3192ef7d9
font_01_sfnt_off0001316e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316E 11560 bytes
SHA-256: 6257bfe76de4f7094fdcd9c514be13f05ed47be3959dee9ac364ea1db088ca1f

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