Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0b672f07e19d03…

MALICIOUS

PDF

74.7 KB Created: 2021-04-28 15:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 93dc4c536860f247a0f992c76cb34583 SHA-1: de198615c6420b6d87cdfd6e4218a19b5a4eb640 SHA-256: fa0b672f07e19d035f17d17aa198d650bdbdaf51b94efc39a8f8d5948b637294
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9992

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://xezojetit.ru/strik?utm_term=electrolux+fridge+repair+singapore PDF link annotation
    • http://ganoget.scienceontheweb.net/case_files_family_medicine_4th_edition_download.pdfIn PDF document text
    • http://kodutizaga.mywebcommunity.org/dojosatulenirivenul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390680/normal_5fdf3b8662373.pdfIn PDF document text
    • http://taher-tcac.com/zitalazosqv11z.pdfIn PDF document text
    • http://sokfresh.fun/5030654651593mhq.pdfIn PDF document text
    • http://espaceabonnes.com/14890500551vp6fy.pdfIn PDF document text
    • http://puvepum.getenjoyment.net/sokisovakojapakozaviv.pdfIn PDF document text
    • http://idealicaitaly-ufficiale.site/wolverine_f2d_titan_film_to_digital_convertertoz6p.pdfIn PDF document text
    • http://zomolejefej.mywebcommunity.org/enzyme_catalyzed_reaction.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376866/normal_603ea8248552a.pdfIn PDF document text
    • http://biwedujurar.mywebcommunity.org/32859520430.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383928/normal_6041e7d390d38.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/401f58b0-77e0-4f9f-afbc-71fefa215d98/zolejemipadusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb52b343-2af5-47f6-adc5-db1a64bc02d6/35155681768.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab5c19b4-0aa9-4eee-913a-84448fc313cf/business_analyst_jobs_singapore_salary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1924ff1-9d23-4677-88ab-38c765af58e4/best_books_on_financial_modelling_using_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffee9712-ee63-4f79-93e8-911b8a393ea8/50108084845.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffa1ea54-7f57-4b9e-ab6f-abb20a458f85/greek_gods_yogurt_nutrition_label.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed4548e0-5167-4252-b6b5-1c448dbaf14b/1608755899.pdfIn PDF document text
    • http://samajusinifako.atwebpages.com/cheat_codes_simcity_4_deluxe_edition_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18141fe4-80c6-4664-b7d0-d913351f0131/74362796009.pdfIn PDF document text
    • http://peledopa.myartsonline.com/what_is_the_default_password_for_spectrum_modem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb773d00-476f-41ed-8f6e-caeea0db160a/how_to_reset_prius_maintenance_light_2011.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_off0000e4d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D6 5348 bytes
SHA-256: 66a0cd1bbe9e8a2d844dbf3cde8df4e3c82aba7d5af1b4fa7c482e763a277c59
font_01_sfnt_off0000f724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF724 11036 bytes
SHA-256: fc2640cc04e246f4229162adc245f6a2b26241b536bb954829da4acfe1a6d9b5

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