Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ffebc8a392255f…

MALICIOUS

PDF

76.9 KB Created: 2021-04-05 15:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e20f2b32a80acadf16d7f12bc51deb10 SHA-1: 9efdf0bfe65b7dbf4014cfa681fadc23d932fd6f SHA-256: 24ffebc8a392255f4411af9d1f85834bf2ddef4b69c0808e73ac1a16653a4d78
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://resalured.ru/aws?utm_term=love+yourself+reply+song+lyrics PDF link annotation
    • http://japebevavagufip.22web.org/dict._cc_dictionary_apk_full.pdfIn PDF document text
    • http://xexudoj.22web.org/punctuation_correction_worksheets.pdfIn PDF document text
    • http://nolubebizufusim.iblogger.org/hallelujah_song_sheet_music.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/acuerdos_de_basilea_2.pdfIn PDF document text
    • http://totaxusozavu.sportsontheweb.net/8731558608.pdfIn PDF document text
    • http://lemakomude.sportsontheweb.net/tratamiento_para_anemia_ferropenica.pdfIn PDF document text
    • http://leziwazedo.mypressonline.com/south_africa_blank_map.pdfIn PDF document text
    • http://juvugewit.iblogger.org/fusuxizawunemebanimigeb.pdfIn PDF document text
    • http://zidotuwad.22web.org/vumenuxotarigaxixijuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/will_us_society_collapse.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/nelujemexow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27bcf4a1-f0fc-45d8-992a-0f6a0197ad41/30433402527.pdfIn PDF document text
    • http://jimatisejur.rf.gd/99005651628.pdfIn PDF document text
    • http://jetufijat.rf.gd/adarsha_hindu_hotel_book.pdfIn PDF document text
    • http://xuwanozofugis.epizy.com/93228375455.pdfIn PDF document text
    • http://muxajetolalet.epizy.com/75594589445.pdfIn PDF document text
    • http://gurabagoderes.atwebpages.com/power_book_2_ghost_season_2_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/isaiah_berlin_roots_of_romanticism.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/refilaburuxupolur.pdfIn PDF document text
    • http://pagupim.epizy.com/runomid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b7bc0af-629b-41ee-8f76-284fe4a1ec97/fulipavagozalewoxixow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50622a4f-1a2a-44de-8d5e-adb8190535db/names_for_twins_in_yoruba.pdfIn PDF document text
    • http://werawizanobekiz.rf.gd/libro_para_colorear_animales_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69199500-99c6-4702-80a5-fddd10c16815/memento_mori_jewelry_antique.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_off0000eece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECE 5076 bytes
SHA-256: 56989d31b8608be8aeb1f38550370bf2d3c5556582021999451445b28a392237
font_01_sfnt_off00010045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10045 11068 bytes
SHA-256: 8f35b06a163782fc3d7b7f4b9033c1c5f6030aa1bdc222bbc572c91f85da2141

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