Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e1bda24c1eb6fe…

MALICIOUS

PDF

105.1 KB Created: 2021-03-22 02:53:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a96251b32fbe6dba136a055232f2562f SHA-1: 1b872aecfb6ebc955daf0cdc83bc2495f1bf40bc SHA-256: b0e1bda24c1eb6fe3836458606c3f848a130bac223a65fb7675e13b016c2f8fe
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly support this assessment. While no scripts were explicitly extracted, the nature of the embedded URLs and the link farm heuristic suggest an attempt to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/123?utm_term=birthday+roses+images+free PDF link annotation
    • http://koperorav.iblogger.org/jodoxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470211/normal_60186ddbf0aa3.pdfIn PDF document text
    • http://lulodexav.iblogger.org/pavivikug.pdfIn PDF document text
    • http://pocki.top/how_to_install_evenflo_infant_car_seatqgxvo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457318/normal_5fee2af1bdb4a.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/jjUijjj/fruit_candy_bomb_cheat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465003/normal_6039ecd952db9.pdfIn PDF document text
    • http://wopudidadufi.22web.org/31484432153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448357/normal_6051594b6f237.pdfIn PDF document text
    • https://cdn.sqhk.co/benanejufa/7icGieY/super_zig_zag_world_music.pdfIn PDF document text
    • http://gaxuzafepuwe.iblogger.org/present_perfect_simple_and_present_perfect_continuous_advanced_exercises.pdfIn PDF document text
    • http://tonagruz.ru/bezubaan_abcd.mp3_song_free_downloadtxlk9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1745bdef-4c2a-4c9e-9ca0-5cf8f622c510/7219094840.pdfIn PDF document text
    • http://xubewabe.epizy.com/voxeka.pdfIn PDF document text
    • http://wufizijutema.rf.gd/zerizud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b9d138f-81d2-4bf4-8d8d-8e9e708c7043/64775952572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd9c3f42-efea-4e2a-b458-d08778acd6dd/dezaxox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0579b5e8-88d4-4744-9526-6cd54cbd7cb7/49293877496.pdfIn PDF document text
    • http://dugoneluxokudu.rf.gd/jude_the_obscure_summary_part_1.pdfIn PDF document text
    • http://nozafawuronixe.epizy.com/american_english_file_3_workbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a6dda1d-2cee-4898-9211-1fac7c6be7f7/51740199762.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001471d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1471D 5440 bytes
SHA-256: 76319cf0a5ab9908eb0ec7d197c02dfded70dd4f0632df714c872ff4b6b2b986
font_01_sfnt_off00015981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15981 11796 bytes
SHA-256: d7e1470961f2f95bfdd041f9cc3c2275d1aca54a183917e3914d35ab9453a3f4
font_02_sfnt_off000181ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181AB 16140 bytes
SHA-256: 1ffca1ef16be5e2ec436e77f9211a88ad3199dc781cb76600401cc2e2c7dce6d

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