Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe688e10abf978a…

MALICIOUS

PDF

78.3 KB Created: 2021-06-09 02:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 01cb89ba150d638482460f73b3726e80 SHA-1: 240ae71352cb9e3f3dbf657aabd68efd9b20d2f4 SHA-256: ebe688e10abf978a211ed30242556a89bc8876bc6b1ee7b77445f7d0cf116a2b
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, and it contains an external URI pointing to a link farm. The PDF's structure and the presence of numerous links suggest an attempt to trick users into downloading content, likely malware, by disguising it as a game download. The embedded URL is the primary indicator of this 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://drafthe.ru/pbw?utm_term=demon+slayer+fan+game+apk+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477400/normal_6054fd34f256d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383147/normal_6038b5c8284f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5fd677cab9cfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412996/normal_60472c419ef0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452846/normal_6054e203621c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://negaboxa.pbworks.com/f/gezibabamiwu.pdfIn PDF document text
    • http://pakesobiroge.pbworks.com/w/file/fetch/144620538/probability_statistics_and_random_processes_for_electrical_engineering_3rd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e5c4543-e28e-4784-ac48-9d9c5b1f3ff1/memrias_pstumas_de_brs_cubas_resenha_filme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a62e71ab-f830-4e80-9a2f-0ff2be330536/national_plumbing_code_canada_2010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23a7d9e3-64c1-4d0e-bc0a-24043544f482/lamedabipagawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9880f3dd-8c3d-4fdb-8260-18047c85fe1f/war_robots_workshop_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8537e05e-3130-49e9-b3c5-b0dbac6dfc63/48610206010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a64c71ca-ea10-4e48-99a7-cc48565c80c0/60635112302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc21160a-80ba-4d3b-b175-6f43dd23e9fb/53298878672.pdfIn PDF document text
    • http://vatojorisa.pbworks.com/w/file/fetch/144444990/87294134097.pdfIn PDF document text
    • http://medodadepud.pbworks.com/w/file/fetch/144770934/3.pdfIn PDF document text
    • http://mefijunov.pbworks.com/f/8706867918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e32587c0-0835-4cd3-b544-01886ac4ab38/98753972979.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b566f20-8830-4308-a5d8-e6002b4b2941/how_does_matter_change_and_energy_flow_through_an_ecosystem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8845addd-673c-4f51-a31f-3f082ce4c716/kimasokepid.pdfIn PDF document text
    • http://bizogug.pbworks.com/f/how_to_mine_ethereum_2020_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f04b5b7-53a2-4bf6-8838-b695032b8e9a/how_many_pages_is_the_longest_book.pdfIn PDF document text
    • http://nugurafuge.pbworks.com/f/why_does_my_ge_gas_dryer_not_heat_up.pdfIn PDF document text
    • http://vojewukejiwu.pbworks.com/w/file/fetch/144901635/toruw.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_off0000ef18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF18 5620 bytes
SHA-256: 84e2633e1ae77b67cf48078c577231ce9b1160b74e049738349d2c8c1f48a92d
font_01_sfnt_off00010246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10246 12864 bytes
SHA-256: afa8a499084e1e23e1d10a326d62a95b186090314ef9f661c924dff6ab46fcc4