Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebaf64650c5cb1bf…

MALICIOUS

PDF

74.5 KB Created: 2021-05-14 13:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 963059cc8d7cdd499e0d0a5c7c1d8026 SHA-1: 3d13f0386039ad5a44788894d446a57b0ada7838 SHA-256: ebaf64650c5cb1bf3f2583f33494ee8ae9643d99e82bbeb63ad3966aba64b389
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for link farms, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://golowaki.ru/strik?utm_term=ley+de+condominios+ogp PDF link annotation
    • http://getallcreditscores.info/the_nature_of_scientific_reasoning_analysis6pd5o.pdfIn PDF document text
    • http://clubstore.pro/last_one_standing_board_game_amazon1zycm.pdfIn PDF document text
    • http://look-hotel.com/23191162752c01u7.pdfIn PDF document text
    • http://dimax-matrasy.ru/36006479100upxz.pdfIn PDF document text
    • http://helplnstagramoffice.com/how_to_install_a_schwinn_bike_trailer9fwl4.pdfIn PDF document text
    • http://nosinoski.shop/58679181919jg4ei.pdfIn PDF document text
    • http://cherrypimp.online/cissp_for_beginnerszuhu6.pdfIn PDF document text
    • http://unlockdeals.shop/762323652560pgez.pdfIn PDF document text
    • http://uniques.space/metformin_tablets_ip_500mg_uses_in_tamildkd4a.pdfIn PDF document text
    • http://momentshop.website/mxr_10_band_equalizer_settings1c92b.pdfIn PDF document text
    • http://umkatrade.ru/vipulubodag6haz0.pdfIn PDF document text
    • http://djami.ru/lagu_cinta_luar_biasa_andmesh_kamalengp9euq.pdfIn PDF document text
    • http://save50.pro/picsart_software_for_desktopm1bvw.pdfIn PDF document text
    • http://pubgucbayim.com/28185499867z87e6.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/bopuligapavamulozzhqj8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_54e95ef966fd475cb11a61e4a41832b9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/sujuzajolepezewosujoku.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/51940091064.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/dijome.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/what_is_considered_critical_condition.pdfIn PDF document text
    • https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_9cb836c08fa7421492a8b22f7164b060.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/application_form_for_passport_2019.pdfIn PDF document text
    • https://d52369c8-37f2-40d9-9d5f-d682b3b4a2e4.filesusr.com/ugd/6d5a7b_d98acda39f8745b0b69df214f66886d1.pdf?index=trueIn 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_off0000e394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE394 5096 bytes
SHA-256: 07cb5457ca1f66be45e0de1bd2f6cf187c1ea83b1b0b6920df5ce628e10c7def
font_01_sfnt_off0000f4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EF 11864 bytes
SHA-256: e17448c1f2a79dedff443868e532556cb93391ec86d6658b0da03bb6ca7e2a53

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