Malicious PDF — malware analysis report

Static analysis result for SHA-256 705d983d077d9ac4…

MALICIOUS

PDF

82.3 KB Created: 2021-05-18 12:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9ad7c3fbd4f4b627b277da794755ea34 SHA-1: 14315a640dcee7293f1c81e50140359afc221192 SHA-256: 705d983d077d9ac4616f3b9e775ba236d449896ca01e06e80c29944bda24a77d
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, appears to reference a 'Frankenstein graphic novel study guide', likely a lure to entice users to click on the embedded URLs.

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://druttle.ru/strik?utm_term=frankenstein+graphic+novel+study+guide PDF link annotation
    • https://mebavowu.weebly.com/uploads/1/3/4/3/134353315/104277.pdfIn PDF document text
    • https://perufagumitaxa.weebly.com/uploads/1/3/0/7/130738779/61547.pdfIn PDF document text
    • https://xitemexum.weebly.com/uploads/1/3/4/3/134311382/9800230.pdfIn PDF document text
    • https://pekumovulimezel.weebly.com/uploads/1/3/4/3/134363026/6c4d20.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/ponivotigegepub/a_cuantos_centimetros_cubicos_equivale_1_metro_cubico.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/architectural_drafting_and_design_book_free.pdfIn PDF document text
    • http://velosipu.epizy.com/codominance_and_multiple_alleles.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/25875607339.pdfIn PDF document text
    • http://vazorilumi.epizy.com/english_syntactic_analysis.pdfIn PDF document text
    • http://fusifovizit.rf.gd/91477353088.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1df06a9e-88b5-4203-a051-5c52d79dacd7/best_beginner_yoga_routine.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/analisis_literario_de_sueo_de_una_noche_de_verano.pdfIn PDF document text
    • http://kugunimekuxaf.epizy.com/powuxexilitovino.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/dkls_industries_bhd_annual_report_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6a92736-1573-4b9f-bb42-5fef1b808e8e/larovokivowedukugof.pdfIn PDF document text
    • http://napubuxuwel.epizy.com/rivomamemoruwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d00ed89-df12-43fa-8a69-9ba275a97c07/gutesivizuzonupituvupuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c012cdb-2c91-4f96-b922-8587a4ae712f/91700343269.pdfIn PDF document text
    • http://damufabenipete.rf.gd/ccna_2_practice_final_exam_answers_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/pexogaladurugipegelunume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e48610d3-59bb-43a4-8bff-a911290f161d/white_washed_wood_effect_vinyl_flooring.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_off00010292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10292 5516 bytes
SHA-256: 43222dbc3f8c25c53eb1f12742c20d3db496717616d7aae4d00d4949df6fc987
font_01_sfnt_off0001155f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155F 10984 bytes
SHA-256: 5459a25f5ea4aacec7b662d6f2946e7fdf5b23e7da463faa223b44008a2bf5eb

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