Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d128acf66e20a51…

MALICIOUS

PDF

79.8 KB Created: 2021-03-16 08:07:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5ea8d249f0dd540a89ad23528ffd13cb SHA-1: b70f651cdd55c6ef2b2801f4e191b5839c4c00ff SHA-256: 1d128acf66e20a511a371ccea82068835966d6d2f537f2b48a004dd80c51f738
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://pelibifir.ru/award?keyword=laporan+pendahuluan+bblr+pdf PDF link annotation
    • http://cardioactiveuficiale.site/what_sauce_goes_on_dominos_philly_pizzac1wt3.pdfIn PDF document text
    • http://phrensy.co/wedaxeliga51ei6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468553/normal_5fec450a65f34.pdfIn PDF document text
    • http://storedubai.shop/guide_to_algorithms_bookyia4p.pdfIn PDF document text
    • http://harmony-market.ru/gogigojowimapukoeigea.pdfIn PDF document text
    • http://winoorama.site/64040069166levdy.pdfIn PDF document text
    • http://avtoshkola-region26.ru/richard_wright_blueprintuil5o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421615/normal_6031f7fca60c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486745/normal_5feb5154e2e4d.pdfIn PDF document text
    • http://mazikopipovix.mywebcommunity.org/ccna_lab_guide_routing_and_switching.pdfIn PDF document text
    • http://wedurorokim.mypressonline.com/pdf_decrease_file_size.pdfIn PDF document text
    • http://dalnoboyi.xyz/wipibaxegawewmwqbk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427086/normal_604d7b2f20149.pdfIn PDF document text
    • http://xokesate.22web.org/channel_one_tv_guide_today.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/dedupipapekot.pdfIn PDF document text
    • http://giocodigital.space/zonupatulininimif32xi.pdfIn PDF document text
    • http://tebafurunaxinuj.getenjoyment.net/28703295057.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kofukobekageja.epizy.com/66527425104.pdfIn PDF document text
    • http://tuxefunuzire.atwebpages.com/basic_biomechanics_susan_hall_7th_edition.pdfIn PDF document text
    • http://tosawos.epizy.com/free_kyuhyun_a_million_pieces.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE94 4784 bytes
SHA-256: f09f049f16df68cb8964015356c9fc3e2a80e4f89adf319d169700909428d56c
font_01_sfnt_off0000febb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBB 10908 bytes
SHA-256: cbdf4f6a1395762e43843189e358efe2fb77a80e3a8395a44a9bcb80d4e9ea98
font_02_sfnt_off000123e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E2 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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