Malicious PDF — malware analysis report

Static analysis result for SHA-256 69022a8b94c0df2b…

MALICIOUS

PDF

81.1 KB Created: 2021-09-10 05:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d279e79ba9de612e0acde13fbe5959ec SHA-1: 034fd9741c56397181cbbf5a677330cb18ea0902 SHA-256: 69022a8b94c0df2bc77bedaf1ba36d082c594b4335e769cd66c2ee51759d6ffd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including a high ML score and ClamAV detection as a phishing trojan. It contains numerous embedded URLs pointing to external PDF files hosted on various domains, suggesting a link farm or redirection mechanism. While no scripts were explicitly extracted, the presence of external links and the 'Pdf.Phishing.Trojan' detection strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://studiodugnani.it/userfiles/files/7532076940.pdf In PDF document text
    • http://curvesncontours.com/userfiles/file/33626564236.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/25449229667.pdfIn PDF document text
    • http://culfordequestriancentre.org/UserFiles/file/fizulimebefinodemazo.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/21848665770.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/22787725637.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/jozavaragazodiwaliwibux.pdfIn PDF document text
    • https://odlingfamily.com/userfiles/file/61677649489.pdfIn PDF document text
    • http://k9careclinic.in/ckeditor/ckfinder/userfiles/files/78075964824.pdfIn PDF document text
    • http://thegioicamdo.com/upload/files/loxetokaraxitavurukudi.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/68894857019.pdfIn PDF document text
    • https://pgprojekt.pl/Upload/file/53896987813.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/26499685760.pdfIn PDF document text
    • https://bushregenerators.net/userfiles/files/jajufalosa.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021090320440488.pdfIn PDF document text
    • https://excellencetogether.com/img/files/file/fiwukimumojopivezos.pdfIn PDF document text
    • http://aristosaigonhotel.com/uploads/files/93809075143.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/filaja.pdfIn PDF document text
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ziletunofafip.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/depopufimibufotim.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613826d050d51---47366287657.pdfIn PDF document text
    • https://phunhai.net/upload/files/66252103239.pdfIn PDF document text
    • http://artvideo74.ru/upfiles/files/21836428673.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=google+traductor+para+androidPDF 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_off0000d57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57F 19340 bytes
SHA-256: ee610dd848d2fb898264427f0686bfd8b586b7dc5ef49023c6dc9dcd53db8e9e
font_01_sfnt_off000106f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F6 10660 bytes
SHA-256: 6ce2828c28d78df23d439afb7592036f0c05a06d7fc58beab98e6d7e4034c1e9
font_02_sfnt_off00011f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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