Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcb952d0629b263d…

MALICIOUS

PDF

76.8 KB Created: 2021-04-06 13:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7feb76f28c9858918e34eba1448e1296 SHA-1: d5b01fe328e888d988827b006f2b0db6886fd5f4 SHA-256: dcb952d0629b263da5ca83a0fbd6b1d4dae273061a75cd97d22b139465183af6
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-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://xajibur.ru/123?utm_term=adobe+sketch+latest+apk PDF link annotation
    • http://pedaxofanor.mywebcommunity.org/appareillage_electrique.pdfIn PDF document text
    • http://golulim.iblogger.org/bluetooth_for_mac_sierra.pdfIn PDF document text
    • https://cdn.sqhk.co/tinodifozeza/id3uiiS/tap_tap_builder_mod_apk_unlimited_ruby.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CsqibHb/duzibadufefubonatamarukez.pdfIn PDF document text
    • https://cdn.sqhk.co/suxunuke/ib85Whc/monufok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374542/normal_60559b000bd33.pdfIn PDF document text
    • https://cdn.sqhk.co/zegegajugot/IUAjigf/savoxafi.pdfIn PDF document text
    • https://cdn.sqhk.co/lakodatoli/hhihGic/brother_dcp-_l2520dw_service_manual.pdfIn PDF document text
    • http://nakodinita.scienceontheweb.net/59726403367.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472491/normal_605f91ca7d30c.pdfIn PDF document text
    • http://serarudipiwuvon.mypressonline.com/buddenbrook_ita.pdfIn PDF document text
    • http://xabidewukolesas.66ghz.com/memirugojotolamoxirap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kufivafatufit.epizy.com/matatoxa.pdfIn PDF document text
    • http://mogivinisisa.epizy.com/an_ember_in_the_ashes_4th_book_release_date.pdfIn PDF document text
    • http://lawesiwewif.onlinewebshop.net/vosipip.pdfIn PDF document text
    • http://zexenodu.rf.gd/aaja_ni_aaja_video_song_bestwap.pdfIn PDF document text
    • http://sobikunukozi.rf.gd/vobod.pdfIn PDF document text
    • http://nofolimuri.myartsonline.com/dyslexia_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/zagikibutelate.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/5648279034.pdfIn PDF document text
    • http://mevonaku.rf.gd/tedita.pdfIn PDF document text
    • http://zuxamivim.epizy.com/minions_birthday_gif.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/pebobezuximiwub.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/balgeet_marathi_video_free_3gp.pdfIn PDF document text
    • http://mekigif.epizy.com/lawafi.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_off0000ee02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE02 5256 bytes
SHA-256: 5a2b75f485c4cd6706bacf56b44fffc8f34833a2ca3b690a59d0a8cda9fba937
font_01_sfnt_off0000ffe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE3 11160 bytes
SHA-256: 4b19a0bc4dca29f1f4eec1a600e1060700d6a76e2a8cdea3f18f190b8a178528

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