Malicious PDF — malware analysis report

Static analysis result for SHA-256 a596e9e445346d55…

MALICIOUS

PDF

74.2 KB Created: 2021-06-10 00:35:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5d1517b5fefb4c5dd3a93540f754f062 SHA-1: 01710933d5440c3beb4a0c9199b2006b5045b3ca SHA-256: a596e9e445346d55b11f78cc97a3d7ec6f60193be8dfa52c0b7308b60624cddb
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 0.9991

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://crysiq.ru/pbw?utm_term=subnautica+free+download+for+windows+10 PDF link annotation
    • https://weworikifuga.weebly.com/uploads/1/3/4/5/134515792/pudifalufotomug_sasowe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489993/normal_6060dec8e4a4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528780/normal_5fde2dcbc43e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409425/normal_6006a1a5ed37b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409421/normal_5fc69c375eb04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380088/normal_606a54d8c5c7b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377115/normal_6001d468577f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_603bdc7616155.pdfIn PDF document text
    • https://laganavixafalos.weebly.com/uploads/1/3/5/3/135341912/5534a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447097/normal_5fdcdff51c042.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415756/normal_6035ea433f41b.pdfIn PDF document text
    • https://lapefobok.weebly.com/uploads/1/3/4/6/134663543/rupojigi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504641/normal_603a0938cc1bd.pdfIn PDF document text
    • https://fipiwodumuxi.weebly.com/uploads/1/3/1/4/131453050/goganatikubok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454809/normal_600a53559dbca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468823/normal_6043e7988e778.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412170/normal_5feb076a56660.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373779/normal_5ffc151ad81e1.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/07ada55f-0b9e-4006-a60d-3abe46edc161/masterbuilt_mes_140b_40_in_digital_electric_smoker_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/485fcbf7-15a0-43c5-bda4-ff84d51e05a1/american_history_x_movie_plot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1788cda-0e5d-4cfc-aa26-29d16c5cb2b6/why_is_my_kodak_printer_not_printing.pdfIn PDF document text
    • http://puzavofan.pbworks.com/w/file/fetch/144552450/worksheet_answer_hemophilia_the_royal_disease_answer_key.pdfIn PDF document text
    • http://finebov.pbworks.com/f/sistema_de_ecuaciones_lineales_con_dos_incognitas_metodo_de_reduccion_ejemplos.pdfIn PDF document text
    • http://wiliser.pbworks.com/f/kaththi_full_movie_download_720p.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_off0000e5f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F9 5544 bytes
SHA-256: f6c022901c567b5dde17959de1bd2bbe5409a5cbe03c28700b46dfdf0b1219ee
font_01_sfnt_off0000f8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FC 10168 bytes
SHA-256: e6d91e0d1aa2cb85ad3770674f6a6251c632db54ed23051b3b91e4c9468e46a4

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