Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e29114419f91fc…

MALICIOUS

PDF

74.9 KB Created: 2021-09-30 23:36:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 9041bb43ce541bb7e6f9c8f81dfde5a0 SHA-1: 17d87173ac6c1424c4561c531b8e2d499f996d18 SHA-256: 36e29114419f91fcfc44ab82ebe9c3fb7335aec02a8b220cc9869db4f81fe08c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external sites, suggesting it functions as a downloader or redirects users to malicious content. The PDF structure and the presence of external URIs are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://huntic.ru/uplcv?utm_term=how+to+set+dns+in+mobile PDF link annotation
    • https://bcbc3399.com/upload/files/16581747394.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/32235165119.pdfIn PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/27303149680.pdfIn PDF document text
    • https://novsport.com/content/File/83516986933.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/88603c3d383b512968ca5202f91678e1/godizenopovukijibofama.pdfIn PDF document text
    • http://thanhnhomdinhhinh.net/uploads/files/68617983327.pdfIn PDF document text
    • http://poorclarescork.ie/images/63081539743.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/dasutajosigen.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/87590873117.pdfIn PDF document text
    • http://www.anaja-inter.org/public/file/rudosorizer.pdfIn PDF document text
    • http://yetisirkaucuk.com/firma/files/tuworugolutejijafoxamora.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/80336401732.pdfIn PDF document text
    • https://terminarz.online/kosmetyczka/krakow/files/80445337781.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/fegipafozuziwe.pdfIn PDF document text
    • http://www.sname.org.tw/sname/ckfinder/userfiles/files/vukenu.pdfIn PDF document text
    • https://www.emcp-pmce.ca/_includes/ckfinder/userfiles/files/wezizamiwa.pdfIn PDF document text
    • https://sibirprokat.ru/ckfinder/userfiles/files/fijuguja.pdfIn PDF document text
    • http://myucpb.com/userfiles/file/85972999617.pdfIn PDF document text
    • http://partiaweb.com/upload/files/niledisosoresibo.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613576dc7f0da---16324956178.pdfIn PDF document text
    • http://netmode.net/app/webroot/uploads/files/xugililirufokanen.pdfIn PDF document text
    • http://shiokuda1.com/contents/files/75656267272.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://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_off0000be3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE3D 18584 bytes
SHA-256: 22b0a8c9546de05fb4a0f2083151fe4c6dbceb5df7f2cfadb70838d98572dc08
font_01_sfnt_off0000eef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001070a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070A 10364 bytes
SHA-256: c54613efe66022364570dbf773532c761f85b80a65e29879d570990d38957b52

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