Malicious PDF — malware analysis report

Static analysis result for SHA-256 405fe4f0e2bf7854…

MALICIOUS

PDF

90.6 KB Created: 2021-03-12 03:58:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d2adc845c2abd9f6db9f2185034ec0c6 SHA-1: b38875a68fda535ffe547f1b3a50d6bf94e12fc3 SHA-256: 405fe4f0e2bf78540ce0f16e31f52d04651f3f6d1b5a6ace4b3c94f6aec52951
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 0.9997

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 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://soxebez.ru/award?keyword=biblia+de+estudio+inductivo+editorial+vida+pdf PDF link annotation
    • http://niwawopomovaz.22web.org/symbol_scanner_setup_enter.pdfIn PDF document text
    • https://cdn.sqhk.co/tavimuxeju/iam5ghG/lapuxisatapimabarigib.pdfIn PDF document text
    • http://duromexixupa.iblogger.org/has_flagged_your_account_as_settlement_reported.pdfIn PDF document text
    • http://nalilix.iblogger.org/10518962031.pdfIn PDF document text
    • http://jowigosut.iblogger.org/tufakin.pdfIn PDF document text
    • http://gotedez.22web.org/free_christmas_poster_templates_for_word.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/Mqhaoih/23046468761.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/7b687a1e-d811-4d97-be04-b7ab838caac4/best_holmes_humidifier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed226e70-3a7b-4bbd-8ba0-acc2021b51e9/is_warcraft_3_reforged_bad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aefe3afa-5104-40ad-99ff-4552a24ee696/83609370392.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/69401160919.pdfIn PDF document text
    • http://veruzixiki.rf.gd/cica_care_silicone_gel_sheet_for_keloid.pdfIn PDF document text
    • http://zuriromaruwo.epizy.com/house_tree_person_test_scoring_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/269b23ba-98e2-4695-b88e-6cbf00dd86b2/safety_1st_alpha_omega_elite_sophomore_car_seat_installation_video.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/27403850069.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/harry_potter_quiz_house_and_patronus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6faaf486-2781-4256-a197-e0786dfa1660/how_much_do_psychologists_get_paid_in_england.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/687dbd7b-3a4a-4349-bafe-98179201859d/60870362710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61823207-d1db-4548-b764-80ca75cb35b4/vujiwibipatatit.pdfIn PDF document text
    • http://bosadubarelazu.rf.gd/kokusurivalevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3321f80f-75d6-40c8-8ecd-d7b70ed8e797/c_programming_from_problem_analysis_to_program_design_6th_edition_solutions.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_off0001208f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1208F 5400 bytes
SHA-256: 405a339dd0fb1951bb86c693e0bcd7a9beaaf95d8eb729fd106cbfd6ac11938d
font_01_sfnt_off000132ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132FF 12516 bytes
SHA-256: 3f4bcb1f2306ed33bac7b34c083b1ac42193bc747d734e3530a04d3e3918b4a3

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