Malicious PDF — malware analysis report

Static analysis result for SHA-256 9770057861aafc0e…

MALICIOUS

PDF

85.4 KB Created: 2021-09-11 02:23:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: a90189ef65825259d3d52c639a510b86 SHA-1: d3e7f47ebaf740bfe2d81fa9781fbdf4215865e3 SHA-256: 9770057861aafc0efa54a45ff8ec788c366053a4f1648643c6eede8c5266793f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://ipekyolumedya.com/resim_galeri/file/37904283484.pdf In PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161330ea39ad6e---18929700974.pdfIn PDF document text
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/ludosofawik.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/wadodizipexeker.pdfIn PDF document text
    • http://lse.hu/userfiles/file/lotidozegi.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/1357098769.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/35977299623.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/lumibaket.pdfIn PDF document text
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/nukobu.pdfIn PDF document text
    • http://mama-care.com/UserFiles/file/95861641212.pdfIn PDF document text
    • http://inbiosa.eu/static/cfiles/files/87199644920.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210909181200.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/vumoturezanomifaji.pdfIn PDF document text
    • https://weishinclinic.com/uploads/files/202109021802216788.pdfIn PDF document text
    • https://www.luthier-auxerre.fr/ckfinder/userfiles/files/rimopexurudovokipekebijoj.pdfIn PDF document text
    • http://xn----7sbbgprpk7biiq.xn--p1ai/admin/ckfinder/userfiles/files/kejanebofiviv.pdfIn PDF document text
    • https://bosingels.nl/ckfinder/userfiles/files/wukegeregid.pdfIn PDF document text
    • https://garnizone.com/userfiles/file/10514842766.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/12943780646.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/28719563983.pdfIn PDF document text
    • https://flammerouge.ch/userfiles/files/satejav.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/43431046234.pdfIn PDF document text
    • http://vdi.vn/userfiles/file/82941573582.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/fudobepamipajep.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b48a0f6e3---zotujag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=thea+stilton+books+pdf+download+freePDF 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_off0000e8df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DF 17968 bytes
SHA-256: 697140a7abc7dd70f587b42d35b8467ab925934e2d0bd7ad860d72078b22ae4f
font_01_sfnt_off000116ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F04 10876 bytes
SHA-256: d22a8e08e7653ebf993f11fa2e7c1a339de1bb89fcb8f433c9f9ce4f9ae5276a