Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4683570263e1a0…

MALICIOUS

PDF

78.3 KB Created: 2021-03-11 00:44:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2b6511a170f720aa4c12dfdcfc9911e1 SHA-1: 1f70ba005de956bd9c421d1defd067686bdd3c2e SHA-256: cc4683570263e1a094821bc2c6c1f0762cc9222f2383c85af6af16aa379f3f9a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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-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.
  • 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://leonvi.ru/123?utm_term=unhide+first+column+in+excel+spreadsheet PDF link annotation
    • https://dezazobe.weebly.com/uploads/1/3/4/7/134755526/wesatiruf.pdfIn PDF document text
    • https://bezijenogekise.weebly.com/uploads/1/3/4/8/134875893/vijijosuboru_tesixuwemiri_tules_dizanir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376087/normal_6000cc2d27cff.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefawoz/jaNja4O/motafobajedore.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/Ojfjjaz/gawemogasevosonaxaxosog.pdfIn PDF document text
    • https://sapobukemofox.weebly.com/uploads/1/3/5/9/135974899/kebejodirijapusozu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470545/normal_6004f967617cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468819/normal_5fd634d5ee449.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/249c22d0-8736-4267-87a0-198ac3e6dbc3/dasedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56ea6e63-fd77-4cb3-9e1f-d6bf5048b7a2/pastor_yiye_avila_orando_en_el_espiritu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3511760-65d0-4653-9947-b5864f5e5c89/whats_the_best_electric_blanket_to_buy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c00a2630-276f-421b-93f4-959f079064da/what_flower_rhymes_with_daisy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03764fb0-f45d-4e43-aa6b-7f1d6b6c4126/97743806084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b937b06-5af5-4fc9-aba0-932030279601/advanced_ms_excel_course_fees_and_duration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc296e2a-900a-48a7-8ec4-a58a7a7d617a/how_to_download_to_kindle_fire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bd38dbf-33d1-4821-b435-f9a073b46276/aircraft_maintenance_technician_salary_in_dubai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41b097a4-b082-4311-86b8-ad7652cf2afd/defiant_motion_security_light_battery_operated.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b1c3d20-c865-42de-be1b-89f44e839496/digebopetaworatijevurido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2e421a2-17a2-4525-8c86-f8798fefe0e2/como_hacer_una_receta_de_cocina_en_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/630f4a55-0593-42c4-86af-57da297fb152/pgcet_computer_science_books_free_download.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E4 5452 bytes
SHA-256: 6fbc36c219e7d7b44575d1283a1ac8c92216d3bb3fde4a4848d1e581f470e93c
font_01_sfnt_off0001074f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074F 10732 bytes
SHA-256: 79c8a240c0512fa5dff1e313e5f52d91c06a6978a03245e774fb15b1fcba13fb

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