Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d129a2ae2cf453…

MALICIOUS

PDF

81.5 KB Created: 2021-03-22 20:55:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: aec66dfe9d25f11ef1188366ce0681e1 SHA-1: e20f15356ef5bad62932d0d0397328c0b32bb8e7 SHA-256: 89d129a2ae2cf453905c3e4d21d2f34064c3b00f9e7ce4e820111afadac39a08
126 Risk Score

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/aws?utm_term=how+to+produce+canola+oil PDF link annotation
    • http://sepoxudozixo.sportsontheweb.net/zafutenimidosama.pdfIn PDF document text
    • https://kaxutaxi.weebly.com/uploads/1/3/4/3/134387751/korisebiragoxev_muviz_kaviworawuvasev.pdfIn PDF document text
    • http://dvigatel.guru/jogasilid49sf.pdfIn PDF document text
    • https://girakojazesu.weebly.com/uploads/1/3/4/6/134675992/zarusedibubaxonafexe.pdfIn PDF document text
    • http://instapriz365.site/fimawexelogijf9qpr.pdfIn PDF document text
    • http://nusowutevu.getenjoyment.net/super_champ_x2_footswitch.pdfIn PDF document text
    • http://giftcard-sale.store/og_mandino_books_in_chronological_orderqgqey.pdfIn PDF document text
    • http://nomevufaneboja.mypressonline.com/childrens_bible_story_books_online.pdfIn PDF document text
    • http://tamogulaganero.scienceontheweb.net/kibupotusigida.pdfIn PDF document text
    • http://rejasikega.scienceontheweb.net/lg_washing_machine_manual_inverter_direct_drive.pdfIn PDF document text
    • https://pebawozo.weebly.com/uploads/1/3/4/8/134865175/sumesoxize-wezofalazibake-zobitosetexiliw-nunugisogejav.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/divetuxilamu.pdfIn PDF document text
    • https://gimisezijumini.weebly.com/uploads/1/3/1/4/131453276/4294093.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/canon_pixma_mg5320_wireless_inkjet_photo_all-in-one_printer.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/abnormal_psychology_ann_kring_free_download.pdfIn PDF document text
    • https://gigazubexu.weebly.com/uploads/1/3/4/6/134613152/767449.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tiwatimab.atwebpages.com/irobot_braava_jet_cleaning_solution_alternative.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/the_vampire_diaries_tyler_and_caroline_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/best_way_to_learn_to_code_apps.pdfIn PDF document text
    • http://vebagakid.onlinewebshop.net/maths_textbook_for_class_10_maharashtra_board.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/54298080923.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9A 4940 bytes
SHA-256: cb056ade9b254d50780a45b3af48586734b988dcff17f4c0bf902db1dc941d2f
font_01_sfnt_off0000ff82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF82 10296 bytes
SHA-256: ae14d419e2f90f55971b75dfd64edb7f4d60d39ed2b5d62cf38b7a87d8a88142
font_02_sfnt_off000122fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FD 16416 bytes
SHA-256: 06f9f397a3e63dc2a08781e6271279b584ca2d8359dcb8d7a8783b1e0dfc5e25

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