Malicious PDF — malware analysis report

Static analysis result for SHA-256 580d6a9706ffcc3f…

MALICIOUS

PDF

102.2 KB Created: 2021-09-05 04:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c4ff41283de074ecd0f0e14e6ae59c7e SHA-1: e15af79ccc8146ca955e26fe07c6ebd579bc3ac8 SHA-256: 580d6a9706ffcc3f1279ca6b0632aad5618e5030d6189c0044ff7ece3bfa083c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://weilandensemble.nl/ckfinder/userfiles/files/fisuregopeje.pdf In PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bfae7611f8e---kigapaketevawurawe.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/fazuburuzapugasunuzipugu.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/db3bb7683b3160ab347175b1d4f0874b/dowekoweniniparefebukuxi.pdfIn PDF document text
    • http://atek-ent.com/upload/file/davopufukabekavusududobok.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/ae9216ea83314af2d5e26bb7ba48251d/4785066726.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/bajufon.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a308c7303b3---nateto.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/fd96ff2c0344cd05085aeff53206199a/tozirojifon.pdfIn PDF document text
    • http://xn----8sbemnkjd7bfu.xn--p1ai/design/img/upload/file/39675136090.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cc4ec3ece2e---luzodosuziv.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/pokedafes.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/81469872558.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f726abea28---kuwamuniwukenufe.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/40638404418.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/d29fdf30a5d18c2ddd9c5775446c0562/pakusipir.pdfIn PDF document text
    • https://gotoko.com/cmsv2/upload/files/15424160111.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607625c5ede2b---wezixuxewadiwemu.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/ca82cda60494035be4444bd3b008c2d0/59344279687.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/12054619794.pdfIn PDF document text
    • https://tbsva.org/Upload/files/20210816010643.pdfIn PDF document text
    • http://thegioixedap.net/upload/files/lifezomuruvojeladeni.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607063fe15a44---45314720920.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=tenses+exercises+for+class+7+pdfPDF 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_off000127f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F6 10628 bytes
SHA-256: 973df2bcb418806bf5f58ca79454bc84b9c9ca6ebc012c80bb698164fca830dc
font_01_sfnt_off0001406d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1406D 19184 bytes
SHA-256: f72863921f6968eca900a49b209e52668673443fd786f7e8750b17b8010096dd
font_02_sfnt_off000172e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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