Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e79de0274646da…

MALICIOUS

PDF

73.2 KB Created: 2021-09-24 20:37:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a00fc14c61fd90783bc6366260bdda7f SHA-1: 906a381782a2c19bcc3a892f2d3626b0826cba97 SHA-256: f7e79de0274646dae7afb6b3395aba0826b2267ebf39667804f06888b259b908
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains embedded JavaScript and numerous URLs, many of which point to link farms on disposable or compromised hosting. The presence of JavaScript and the link farm structure suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery. The document body itself is heavily obfuscated and appears to be non-readable content generated by wkhtmltopdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://chcial.ru/uplcv?utm_term=8+ball+pool+hack+2020+ios PDF link annotation
    • https://aymexco.eu/ckfinder/userfiles/files/38341323302.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/kakep.pdfIn PDF document text
    • http://deforma.it/userfiles/files/55078682078.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/15289560115.pdfIn PDF document text
    • http://hadt.vn/upload/files/soridepoxedesafuwitu.pdfIn PDF document text
    • http://jn-zhsc.com/upload/83225855782.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/29288475165.pdfIn PDF document text
    • http://medica-brno.com/files/foworapojuwububogufiruj.pdfIn PDF document text
    • https://www.totspotdaynursery.co.uk/ckfinder/userfiles/files/16878868783.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/farajuzopitijig.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/gorukulexodenexakokez.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce21e9d887---40442858107.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6e4311f4e---89403317128.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/tetowopubukifumuxatemoma.pdfIn PDF document text
    • http://cuacuongiare.vn/upload/files/zipekazojegipog.pdfIn PDF document text
    • http://antonellascarpittadesigner.it/userfiles/files/delig.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/45111695381.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/fulabumupag.pdfIn PDF document text
    • http://nhakhoasaigonkimcuong.com/uploads/images/files/kusebokafakuzujabi.pdfIn PDF document text
    • https://support-trevianum.nl/userfiles/files/fodotulidekebixupi.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16142962c96263---fabelosubopurok.pdfIn PDF document text
    • http://vaonhaphatphap.com/images/uploads/files/65930375563.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/44024466212.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/26162378428.pdfIn PDF document text
    • http://gpshardorawal.com/hemkunt/userfiles/file/rujuludofesukuruwefad.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1614dfd69799af---begaxujuzow.pdfIn PDF document text
    • https://robustbrakes.com/administrator/imagetemp/file/tasunev.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_off0000b884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB884 10620 bytes
SHA-256: 23363a3831b3b839008cfc1b3b790873176b9cd2bc949c4372c3c68f03d3f698
font_01_sfnt_off0000d0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AE 17968 bytes
SHA-256: 4754840188a2aa99c5cdb50ddab6eb51ca759ab970cbec66112710e5f4fec079
font_02_sfnt_off0000fee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.