Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d95c03213836539…

MALICIOUS

PDF

79.7 KB Created: 2021-09-14 09:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5484ab2991c56af970229ca8784a5c93 SHA-1: 59a6ee606b3757287a2fdff1b8e9a0972e7e7887 SHA-256: 0d95c03213836539a51826b8b25a41005f29cabc307af44a6dddceef27345401
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external URIs and link farm patterns, indicating an attempt to redirect users to external sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of multiple compromised CMS upload links and disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://garglob.ru/uplcv?utm_term=quickoffice+apk+for+android PDF link annotation
    • https://rolcsi-bau.hu/userfiles/files/kukajezuzisegijiluxuduv.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/mikobeso.pdfIn PDF document text
    • http://hakanhurdacilik.com/userfiles/file/wetomawixade.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/sufodiminiwusobuvug.pdfIn PDF document text
    • http://ez-surveying.com/htdocs/cljr/data/files/35933818239.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613987bc815ee---libukefepamugokel.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9643873522.pdfIn PDF document text
    • https://orangerun.re/photo/files/74395807173.pdfIn PDF document text
    • http://zpkprzemysl.pl/ckfinder/userfiles/files/vefivujunenododefuru.pdfIn PDF document text
    • https://media-get.com/userfiles/files/37419053478.pdfIn PDF document text
    • https://chatham-ebenezer.ckdomain.com/uploads/userfiles/files/dirabetapevakivimizared.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/31673153295.pdfIn PDF document text
    • http://hzkontejnery.cz/ckfinder/userfiles/files/gesozusipidivepofod.pdfIn PDF document text
    • http://agriturismolataggiasca.eu/userfiles/files/lodogare.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613726d8b100f---xuxojazobigopiluxiluve.pdfIn PDF document text
    • http://digjamaica.com/app/webroot/files/1373566891.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/77200222132.pdfIn PDF document text
    • http://xyr59.com/filespath/files/20210907091418.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/2351334507.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/korarimamadofobuvuvi.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210905023820079.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/96906690684.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161401c2d758ff---80149089709.pdfIn PDF document text
    • http://01host.ru/userfiles/files/87104241860.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_off0000c5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5FD 10552 bytes
SHA-256: 24a10a5375c5272342dd1757e3712e7bfc7d5754b9499bafe7512dcde52daecc
font_01_sfnt_off0000de39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE39 22860 bytes
SHA-256: d84b6b09cabcf81556fd0397d32ffefe60683fb0e1f70c436a165e492b1489ca
font_02_sfnt_off00011995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11995 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1