Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b886d35ae4fe68f…

MALICIOUS

PDF

97.2 KB Created: 2021-03-23 11:34:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9279b6b0da5dd9caa1bde7a7362427a8 SHA-1: b452ed80c8e2ab9ea6a84ea2ff044ded3f0efcbf SHA-256: 0b886d35ae4fe68f310270bd94ee53d1b5831ea5e4937a2a5e9232454facc43e
126 Risk Score

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 0.9998

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://dugedepap.ru/award?keyword=radial+nerve+anatomy+pdf PDF link annotation
    • http://zetomanebegox.iblogger.org/apple_music_button_missing.pdfIn PDF document text
    • http://lufirisor.iblogger.org/libiz.pdfIn PDF document text
    • http://begdas.fun/proctor_modificado_aashto_t_18010mqz.pdfIn PDF document text
    • http://aires.fun/stairway_to_heaven_korean_drama_quotesgte43.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/2jeijhe/spooky_hill_fast-_paced_game.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/1CrwvhB/madness_combat_project_nexus_episode_1._5.pdfIn PDF document text
    • http://hurleyshamburgers.com/wikaz47uk1.pdfIn PDF document text
    • https://cdn.sqhk.co/riragimi/jezXheK/jenugusejuxo.pdfIn PDF document text
    • http://xuvaguwanolinu.66ghz.com/ppt_siklus_akuntansi_perusahaan_jasa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://eee5dff6-7331-416e-acdf-593d0c386862.filesusr.com/ugd/21e9e0_5d6eb59b5a8d43b0b99d812f9db3f23d.pdf?index=trueIn PDF document text
    • http://bopasewawimugu.epizy.com/68504915584.pdfIn PDF document text
    • https://201a0bc5-0eb3-4135-8969-828875a6b07d.filesusr.com/ugd/607883_1fa20173b64e4a56a486c92d6eee1bfd.pdf?index=trueIn PDF document text
    • https://411be8f8-4ba1-40b5-9edf-cc4a2c3d5ecc.filesusr.com/ugd/a86d68_3b48a2c2d0154936a04c6529bbc3b9b1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/36120469994.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/psychology_books_in_urdu.pdfIn PDF document text
    • https://2b81f3f0-3f46-42ff-87a7-5865dd96cd3c.filesusr.com/ugd/fb41f9_f1a13bf6aed146b8b095ff5ef9df4e92.pdf?index=trueIn PDF document text
    • http://koxogulu.rf.gd/22313451203.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/lewebeweve.pdfIn PDF document text
    • http://garaben.rf.gd/physical_and_chemical_properties_of_seawater.pdfIn PDF document text
    • http://xifabemifuxiza.rf.gd/92087734931.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_off00013f58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F58 5176 bytes
SHA-256: 46fb39123a13a31f4859c6add79f2d1395183f2e71c91ca7645da6bc15f23ee4
font_01_sfnt_off000150f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150F0 11992 bytes
SHA-256: ddeaea389c42b3c5c38ef1885f94d93c71e8b1739f1fa279ebed23e8d7294781

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