Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2c629bd3ca9e8d…

MALICIOUS

PDF

80.9 KB Created: 2021-03-12 17:05:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b93c384a1b6c1350470510067f3c3565 SHA-1: 36b3f30c77d75c80561669bd8ec5c5c3fee9e65d SHA-256: 0c2c629bd3ca9e8d5fd39d041a7b47dc67000c69ce409c79a38e33c19579cefc
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 0.9996

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://maypoin.ru/wix?keyword=piano+apk+2020 PDF link annotation
    • http://zijafanovidiz.sportsontheweb.net/pixekavedodawokedezoxin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410000/normal_6036de20a26ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482623/normal_5ffe53e19fd61.pdfIn PDF document text
    • http://nijavugev.22web.org/tumiva.pdfIn PDF document text
    • http://duzegotola.medianewsonline.com/10_x_10_grid_free_printable.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_60128f080f26f.pdfIn PDF document text
    • http://wegaturagifo.getenjoyment.net/gexedufixop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449397/normal_5fef50b2b76e0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vimixof.onlinewebshop.net/65480844053.pdfIn PDF document text
    • http://bebojivim.myartsonline.com/22386856349.pdfIn PDF document text
    • http://pezaruzij.rf.gd/cells_alive_meiosis_phase_worksheet_key.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/best_smart_board_for_classroom_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/excel_2010_bedingte_formatierung_nicht_leere_zellen.pdfIn PDF document text
    • http://jejogekatexun.epizy.com/r_for_beginners_book.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/what_does_the_mask_symbolize_in_we_wear_the_mask.pdfIn PDF document text
    • http://zarugosa.epizy.com/zegikixadimazolatuwoziku.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE334 4844 bytes
SHA-256: 023e42084b33d59c7b6da7f0857bcb487a89b9a06fc3f8c231fbbbff7110e8f5
font_01_sfnt_off0000f3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C5 1872 bytes
SHA-256: 0d99920604c987ea8e2d59508795b63e1d9eddc46f728d2906f6fb3d29e52a2a
font_02_sfnt_off0000fcb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB1 10640 bytes
SHA-256: 12ad814c83a950c45b4bf37e42143c44e8c748ea6ba42e6c1ac64babea4278e0
font_03_sfnt_off00012153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12153 16144 bytes
SHA-256: 764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf

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