Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdda13489a49561f…

MALICIOUS

PDF

80.6 KB Created: 2021-09-12 02:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 5960c382432b13eea3673b58173e243f SHA-1: 4c79f95753cbd765e1ddceda98c51c714ace82a5 SHA-256: fdda13489a49561f7abc42e80d1a5e4590230c9741de02ece67467673670b3e9
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://ratchadatitan.com/UserFiles/File/torasodirus.pdf In PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/vevelupuxikogagizuw.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/ruwifuputizadikapexesimaw.pdfIn PDF document text
    • https://talenthunt.biz/userfiles/file/zakovegufojiba.pdfIn PDF document text
    • http://worldtile.net/jangheung/userfiles/file/risivejurojodaguze.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/52924681727.pdfIn PDF document text
    • https://pastelbuilders.com/userfiles/file/77675080171.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/82268595536.pdfIn PDF document text
    • http://wsystem.sk/userfiles/files/18405756780.pdfIn PDF document text
    • https://cicasoftavukatwebsitesi.demowebsiteleri.com/upload/files/xitofupuzikebavuved.pdfIn PDF document text
    • http://hichipper.com/hichipper/uploadfile/file/2021090219235873499.pdfIn PDF document text
    • http://apartmany.cucoriedka.sk/data/files/71115707425.pdfIn PDF document text
    • http://montpellier-businessplan.com/mbp/upload/images/images/upload/ckfinder/jigigebabusulapoj.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/zifefodagedigowipizexu.pdfIn PDF document text
    • https://ksi-system.pl/editorfiles/file/1961856648.pdfIn PDF document text
    • https://cdmsig1.com/ckfinder/userfiles/files/xofixubezabuwibitezuvut.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/ganov.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16130563f568ad---filozuk.pdfIn PDF document text
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/2685229137.pdfIn PDF document text
    • http://pro-group.ru/userfiles/file/81492517073.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16136963eadcfa---fatolur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=why+are+you+not+supposed+to+lay+a+refrigerator+downPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A3 17032 bytes
SHA-256: d3bd7801829f6e458dab732c7cb4599e090f42dfe3fd8b549d3f9ed4b7a30449
font_01_sfnt_off0001032e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B45 11072 bytes
SHA-256: 4c0b5c85066e3e01b8eb5c096bedeb7c8a54608f7a8a566cb1a028fd17aff913

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