Malicious PDF — malware analysis report

Static analysis result for SHA-256 73fcac6b628ad89b…

MALICIOUS

PDF

80.5 KB Created: 2021-03-24 14:57:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 52d6bc44e95fa051067598873520f4b9 SHA-1: 0f19929d3dcee1f5ad904d6dc334c3567f80c4b1 SHA-256: 73fcac6b628ad89b177d3533963b7b85b683e5e7faf8f43d82852a08fb2733aa
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 0.9991

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://midufefew.ru/123?utm_term=houlihan+lokey+restructuring+guide+pdf PDF link annotation
    • https://cdn.sqhk.co/xamowizaso/Fiiqig2/short_life_2_level_13.pdfIn PDF document text
    • http://desawigoxikugaw.mywebcommunity.org/endless_hallelujah_chords.pdfIn PDF document text
    • https://cdn.sqhk.co/bifugudawesu/2jf1haD/botanical_names_of_plants_in_telugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402737/normal_602c6f996e2a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373997/normal_60178631df2d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_60469cb9931b3.pdfIn PDF document text
    • http://ragexerate.22web.org/understanding_comics_scott_mccloud.pdfIn PDF document text
    • http://rabemedexisubis.mygamesonline.org/72046585220.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368493/normal_5fc6ac44d8e2d.pdfIn PDF document text
    • http://jologedeb.getenjoyment.net/pibisazagemef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://povodakav.myartsonline.com/51512874804.pdfIn PDF document text
    • http://lugukejuraxa.rf.gd/81101317945.pdfIn PDF document text
    • http://telewazikenap.rf.gd/brief_formato.pdfIn PDF document text
    • http://xaxibalese.epizy.com/81182088128.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/8747136091.pdfIn PDF document text
    • http://lomurobutu.epizy.com/bluetooth_application_for_android.pdfIn PDF document text
    • http://fobukisa.rf.gd/wabiximobox.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/gujapumifegozuta.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/zuviseguzorugolamol.pdfIn PDF document text
    • http://dofopesofeze.rf.gd/the_umbrella_academy_comic_book_series.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/wigoleva.pdfIn PDF document text
    • http://revupeponalewuj.epizy.com/ninuwuses.pdfIn PDF document text
    • http://jufonab.epizy.com/bible_trivia_for_adults_multiple_choice.pdfIn PDF document text
    • http://fuxobubuwuvivil.epizy.com/12148346457.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_off0000fbdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDB 5544 bytes
SHA-256: 34a28f4cd973c21d430c187a096bec98081cd91514741b8c8b6fc7cd71117069
font_01_sfnt_off00010ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBB 11184 bytes
SHA-256: 092294583fd297fc6af67186804f0c492cbf8f0d13fc15613674f6ddc49cba96

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