Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea329e264d10a5db…

MALICIOUS

PDF

73.9 KB Created: 2021-03-28 11:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 90ddb19d6824858e7cef45062df8b6bb SHA-1: 9b878a26636a5f87c75ca3cb0dd5d82c53c1cac2 SHA-256: ea329e264d10a5db4c5aa9803016bfd37e692d1fcd397b211b1166618e113c91
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 0.9997

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://xajibur.ru/123?utm_term=levixone+chikibombe+video PDF link annotation
    • http://wubowobipevoto.mywebcommunity.org/65255604445.pdfIn PDF document text
    • http://pijubunoze.22web.org/battlefield_1_online_free.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/desafo_del_amor_para_padres_gratis.pdfIn PDF document text
    • http://dufigep.scienceontheweb.net/lowolexe.pdfIn PDF document text
    • http://kivimuxalusis.22web.org/gezilojowoxojav.pdfIn PDF document text
    • http://wejaduz.mypressonline.com/abrasive_jet_machining_journal.pdfIn PDF document text
    • http://xunetokawetik.sportsontheweb.net/82380291314.pdfIn PDF document text
    • http://mirumumavetifun.mypressonline.com/dagemik.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/pemivo.pdfIn PDF document text
    • http://dadivasim.sportsontheweb.net/69918289965.pdfIn PDF document text
    • http://zugobopepoj.sportsontheweb.net/spelling_bee_words.pdfIn PDF document text
    • http://pusewuvi.medianewsonline.com/binary_number_multiplication.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://murapimopavopa.myartsonline.com/16291873930.pdfIn PDF document text
    • https://f4b9ed98-44c1-44e6-9966-d9817cd43de7.filesusr.com/ugd/9ced5d_39e3deaa44b447b1a84fb9b542402b7c.pdf?index=trueIn PDF document text
    • https://2c9641c8-5874-4869-9b94-f1378e60aa6b.filesusr.com/ugd/efc1f6_61dd2f7d125e4222a92954f4cf368c13.pdf?index=trueIn PDF document text
    • http://tososite.onlinewebshop.net/78002197166.pdfIn PDF document text
    • https://edb7bb8d-792a-4213-93ec-7f573d37cc74.filesusr.com/ugd/bfd504_30d826a0b4c24a36b5bd34027d482199.pdf?index=trueIn PDF document text
    • https://ef90beaa-bca2-431e-862c-49c19dd94618.filesusr.com/ugd/06497e_7398ba9628d54636b00c6d2399f06ccd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3851a23-c08e-482b-beb7-2790faf73e45/timex_t235wy_am_fm_dual_alarm_clock_radio_-_white.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16be5696-5aa4-4cbc-95cc-3502486b4a18/vaforilesad.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_off0000d6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F8 4644 bytes
SHA-256: d8e5e55952c29592869d7705e395fa0fd0b286ce5855218cfca981433c845187
font_01_sfnt_off0000e68a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68A 11064 bytes
SHA-256: 2b8309c7f9e544868ce2bc90ca93fe4ace202a79f32a10394fdff4e3c52be004
font_02_sfnt_off00010c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C34 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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