Malicious PDF — malware analysis report

Static analysis result for SHA-256 62addc5c270f8638…

MALICIOUS

PDF

86.0 KB Created: 2021-09-08 18:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 11d8dc3b167d6e704131775e53fa6163 SHA-1: d819a1792fe9f86f62ae84cd08cec62fc985ff89 SHA-256: 62addc5c270f8638fca828b2f739053949f83a77b17a719c99b521d28aa7ce79
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://philabc.ru/uplcv?utm_term=social+science+notes+class+10+cbse+sa2+pdf PDF link annotation
    • http://cungcapbaoduongcuanhatban.com/upload/files/vikuganezo.pdfIn PDF document text
    • http://dpsnowodworze.pl/userfiles/file/90256344739.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/jidufebufalixulaga.pdfIn PDF document text
    • http://saktigroup.in/uploads/tizofalu.pdfIn PDF document text
    • http://0225674989.kad.tw/kads/ckfinder/userfiles/files/53964823963.pdfIn PDF document text
    • https://mrdak.cc/uploadfile/files/1686305461.pdfIn PDF document text
    • http://zekejozsef.eu/FCKfeltoltott/file/31057401118.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/59890686316.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/81971492425.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/8759398981.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/rifovemefi.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/74851203965.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/58574569909.pdfIn PDF document text
    • http://prttour.ca/FileData/ckfinder/files/20210905_63C75D372750E74E.pdfIn PDF document text
    • http://palaciodelosnavas.com/userfiles/file/wilojenaze.pdfIn PDF document text
    • https://consultemergingmarkets.cubsindia.com/files/41712125642.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161334ea817bf3---getugoxorutodinu.pdfIn PDF document text
    • https://totalsewa.com/userfiles/file/doxezavuzogagulirulebele.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138b17e78063---videkiveruliwuvibukabimim.pdfIn PDF document text
    • https://bibliotheque.ville.deux-montagnes.qc.ca/ckfinder/userfiles/files/95812093261.pdfIn PDF document text
    • http://chukgoobok.com/files/fckeditor/file/3860144075.pdfIn PDF document text
    • http://hstairan.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/43714227924.pdfIn PDF document text
    • http://prime42.ru/userfiles/files/gofijasunuval.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_off0000e686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE686 19164 bytes
SHA-256: e4f23c2e1c80c83783a4eafdc02fdc6811b033345521efb3580e46f51820a0e9
font_01_sfnt_off0001188d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A4 11020 bytes
SHA-256: db0238dcd96c9fabb3d2b942edd54af3ebaf7fbdd0985879fd527a13af15a20a