Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5e15d3578089201…

MALICIOUS

PDF

89.1 KB Created: 2021-05-29 10:14:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9b531b9b4ad0d9a7fa77d38dd415242a SHA-1: 9e557833aa029798d48bd9eb2a928b41b24e1046 SHA-256: c5e15d3578089201c8d1357a4ef9818b9b04668f9c11f178f1deae27e54f5bdb
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 0.9997

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 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://lozipotod.ru/123?utm_term=management+report+on+internal+control+template PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446770/normal_5fccb61abed39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462974/normal_606d61b284a87.pdfIn PDF document text
    • https://webebusili.weebly.com/uploads/1/3/0/9/130969565/megilolisojipu-nupoxiputimiwu.pdfIn PDF document text
    • https://mebedepubini.weebly.com/uploads/1/3/0/8/130813558/semobuza-roraxupen-jetafafet-ladebarumimasiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450355/normal_606dd9cbb2f15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426261/normal_5ff684952b17d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/87c33254-9cf0-4c0b-9acf-844e76be4263/before_the_throne_of_god_above_sovereign_grace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97d5cef9-8324-4c1a-b305-606b230cdd3d/rovobefuwifikogaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4acf468e-0d6f-4a65-96d2-ccbb9674753e/can_you_cook_frozen_chicken_on_george_foreman_grill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeca6a94-5fbb-4e5d-bc8c-67893d83fbcf/cules_son_los_tipos_de_plan_de_negocios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f58e0f6-7eb5-486e-8180-903af8fc2492/path_rehras_sahib_read_in_punjabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e64f6327-d165-4a8f-a0f8-48925f431137/how_long_is_a_number_2_clipper_guard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb0a0fa3-da7e-4d7d-8aed-6384c929fa46/28093780651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d936b63-2edd-46d5-8f2e-9905e9c6b349/5043392815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/952b304d-6fd2-4243-8d45-d8ce543af412/total_gym_ultra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/979bb298-3181-4173-9af1-f191ec11de12/braun_thermoscan_7_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92d5594c-c75a-4861-b6ce-b01aeab253d4/how_to_use_yes_man_in_a_sentence.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14bcb9cf-bb08-4c26-9eb4-3ba6e66ef421/tom_sawyer_original_book_cover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cf7fe3b-a5ef-49f4-9a4e-eef22c1aa748/what_do_pets_do_dank_memer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001111d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111D 4868 bytes
SHA-256: 935499be7ab895ccd71e3bf9f2e40da28d746ddc13cbc327b5eaea9e3958801f
font_01_sfnt_off00012186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12186 11756 bytes
SHA-256: 4ccd5e9d5d29945007e6a05a49ce9e57911ec8229d56d9dc3cc4aa73642decc4
font_02_sfnt_off000148f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148F5 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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