Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc25db8cd8aaef6…

MALICIOUS

PDF

80.1 KB Created: 2021-04-03 13:32:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0f4eabc1beeb37949c5d01a052bda6a8 SHA-1: e518a0db698b1b1ad0d68990afa8e3dde9f06711 SHA-256: fcc25db8cd8aaef6079453d169702a0583e2d7102dede16da0263d84b221a0fa
186 Risk Score

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 0.9964

Heuristics 6

  • 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.
  • 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=univariate+and+bivariate+analysis+with+examples+pdf PDF link annotation
    • http://mukovasisoro.mygamesonline.org/black_s_law_dictionary_10th_edition.pdfIn PDF document text
    • http://xoxapepagaxon.mypressonline.com/alcoholismo_causas_y_efectos.pdfIn PDF document text
    • http://kevifiregerufug.scienceontheweb.net/a_night_to_remember_titanic.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/shakespeares_romeo_and_juliet_film_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66a06f70-915e-42f0-8654-94923116face/capital_markets_elite_group_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/956b48d9-d7a9-4b94-9856-a68ed7f470c8/godaddy_social_media_marketing_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dec4158-1e75-47c0-a9ef-35b796d82a0f/66961605919.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/rascal_600_scooter_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71e5aa01-f4bd-45b8-9573-b5f86d51566c/58917531324.pdfIn PDF document text
    • https://4bbf79d8-97e4-42de-9a75-948158c354f0.filesusr.com/ugd/52f5d3_fc7a4a57338b4163b7324600f64e745e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/roxawo/58711266673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e10670a-24f5-4d3a-8087-c4a5c89de86b/27814357478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eccfe4c-b593-4de0-948e-6f147bada36a/optiplex_755_processor_support_list.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/gijusitafupuzatomukujibej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b0547e9-df60-4b8b-9482-0f574a30c2d2/what_is_a_senior_compliance_specialist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1717b01-750a-4e7c-95ea-738033e196a2/arbys_nutrition_information.pdfIn PDF document text
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_b84d7ab7fefb41f389591fb96823faa8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/las_recetas_de_sascha_fitness_casa_del_libro.pdfIn PDF document text
    • http://medazupu.onlinewebshop.net/angela_davis_livros_em.pdfIn PDF document text
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_805afb42a457494c83b29d2000c4a407.pdf?index=trueIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_133d1af476e14ac484a7f34ef3f653cb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb53d94f-ed0a-4cb9-b8f6-3e7de27133c2/food_safety_officer_practice_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24a6bcc3-b7b3-403c-a51f-986905e2a140/what_is_the_relationship_between_the_elements_of_digital_art_and_the_principles_of_design_brainly.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/rariguvuxogonevigula.pdfIn PDF document text
    • https://7ed754b6-a209-4558-9281-0032c7ee8ade.filesusr.com/ugd/4329d7_9035220297cd442cbaa9c900039736a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/in_search_of_answers_destiny_2_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/assassins_creed_renaissance_read_online.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_off0000f9b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B8 5736 bytes
SHA-256: f6802fb498555c06309171d08a9e2ac4d33cda6892e44a78aa3a05cd229366cc
font_01_sfnt_off00010d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D32 10844 bytes
SHA-256: 2d1acdce78288571bb28964487a84b14a74aa30e7a373bd867599bbe3eae1b99