Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f7c772de64972b5…

MALICIOUS

PDF

72.1 KB Created: 2021-04-04 14:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 017a856ebe1cc7c40e199e2810b6e781 SHA-1: ecd5ad14fd4992025a8e90ab561653bb2b150a38 SHA-256: 0f7c772de64972b5c779bf6770f6ac7d09876c7fa936aa5797f5f288e26ab6dd
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or link farms, indicating a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://welaxulisura.weebly.com/uploads/1/3/4/0/134042468/5059754.pdf In PDF document text
    • https://rabofabi.weebly.com/uploads/1/3/0/8/130813834/f966e8.pdfIn PDF document text
    • http://tikanaw.mypressonline.com/16006926020.pdfIn PDF document text
    • https://lagipadule.weebly.com/uploads/1/3/5/3/135301279/kavore.pdfIn PDF document text
    • http://buybritishcat.com/survival_knife_sheath_pouchuck70.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/maxigukikekefe.pdfIn PDF document text
    • http://grenkasalo4.xyz/rokafoxupegad4l3re.pdfIn PDF document text
    • http://wulurag.mygamesonline.org/advanced_excel_course_content.pdfIn PDF document text
    • http://vladmer.ru/journey_to_the_west_book_summarydceen.pdfIn PDF document text
    • http://gopadaxin.mywebcommunity.org/how_much_is_forex_trading_course.pdfIn PDF document text
    • http://swiss-gear.shop/vudebunukosaxinure4f4s1.pdfIn PDF document text
    • http://ladyso.ru/new_holland_ls180_engine_oil_type3krq1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/bVCGPfG74RQ/wb?keyword=dell%20b1160w%20ownerPDF link annotation
    • https://s3.amazonaws.com/nigimul/candyman_1992_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/busotidira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c099e1c-831b-490d-866e-1c66d90404b0/the_game_changers_book_cover.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/75454996594.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93df8dfe-c66c-468a-bd4c-238d7ba9177e/would_you_rather_questions_for_kids_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8390e35-3337-4bdf-937b-d56e23066053/32888387089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d029ffb-6662-4f84-b4de-da6991444962/white_rodgers_thermostat_reset_filter.pdfIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_612c6f6dc32c4ab09564abb9d5439089.pdf?index=trueIn PDF document text
    • https://3c3b6f52-20a2-448a-be11-eec5930c502f.filesusr.com/ugd/0ca786_f8ef167582964acca9c8fa5ba93f8eb9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8c8ad7a-119a-42cf-9817-3a1c6898d556/cooking_merit_badge_worksheet_answers_2017.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_off0000dbae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAE 5444 bytes
SHA-256: d24d79f74a19a4387a1634ef38f6e21eead7c37bb29467b428399b63bd7d43a4
font_01_sfnt_off0000ee33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE33 10664 bytes
SHA-256: 2613e01416578425a8126fae439d8e90394b910dcc5c529f44c87bd2aaece04a

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