Malicious PDF — malware analysis report

Static analysis result for SHA-256 026e03b8bebb985e…

MALICIOUS

PDF

75.3 KB Created: 2021-04-12 02:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 0fc3f68727df0e4ce3ca5ada4b4adb89 SHA-1: 3673ed9268397e298baba5277d8530d2ffec1d2e SHA-256: 026e03b8bebb985e12b98dc0f673486893991e99fff88fcb0a43fe6ad31b1818
164 Risk Score

Malware Insights

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

The sample is identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many pointing to PDFs, suggesting a link farm or redirection mechanism. One of the primary URLs, https://zajinet.ru/strik?utm_term=how+to+install+kodak+esp+office+2150, is likely part of a phishing or malware distribution campaign. No scripts were extracted, but the PDF structure and numerous external links indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/strik?utm_term=how+to+install+kodak+esp+office+2150 PDF link annotation
    • http://lowabunuzoxa.getenjoyment.net/6715839632.pdfIn PDF document text
    • https://nizomepovunamox.weebly.com/uploads/1/3/4/3/134305669/1814752.pdfIn PDF document text
    • https://pekudexuvu.weebly.com/uploads/1/3/1/4/131437333/zimosilamu.pdfIn PDF document text
    • https://gezalimod.weebly.com/uploads/1/3/1/3/131379194/94e78cce2.pdfIn PDF document text
    • https://zefimaral.weebly.com/uploads/1/3/0/7/130776827/wazekumufer.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/jasipefulaxiduj/68325535907.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/platform_ajay_devgan_ki_film_full_movie.pdfIn PDF document text
    • https://7a579b3f-ce96-4c66-abdc-991530493d29.filesusr.com/ugd/010c6b_1ace155f122b4fe0a496eba61a074ace.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/how_many_appliances_can_a_2000_watt_generator_run.pdfIn PDF document text
    • http://loxupobupibim.atwebpages.com/95280037632.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/zugeboxodisamogu.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/kifinefaxejopudupefa.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/zebra_zt410_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/geometric_sequence_and_series_worksheet_kuta.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/raghuvaran_btech_movie_free_in_telugu.pdfIn PDF document text
    • https://25cf7bc6-226b-4013-96fa-c64d334b7dac.filesusr.com/ugd/317e1a_ae0171b67b1644f888be8f58318deff7.pdf?index=trueIn PDF document text
    • http://zevusup.atwebpages.com/adolescent_friendly_health_services.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/how_to_install_verizon_fios_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/game_god_of_war_3_psp_android.pdfIn PDF document text
    • https://4c8cc264-4606-483b-a6fd-3ab48ba5c15a.filesusr.com/ugd/c626f4_c751cfdc799f4f2e92710737af0fdc0b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zamuriza/backup_android_contacts_to_mac.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_off0000e7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DF 5620 bytes
SHA-256: a4e54958b83495a9fb6595cd3e175974c08402e8ebf111f2415d265c644a6e17
font_01_sfnt_off0000fb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB39 10740 bytes
SHA-256: d20395dc98a2fdc3cd6bc938cc5f26d1cf8b485fa3eed03995d21e891cf0280b

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