Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d333190ca396591…

MALICIOUS

PDF

88.3 KB Created: 2021-06-25 23:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ee55d85a6732bfb38b873eb109af97a0 SHA-1: 299f09ccaae7e7c0e91411c9e2333b3e0333d532 SHA-256: 8d333190ca3965916f16f8041ea8927cee4d27d0a7b34dfaa700ebac75bf454c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs are designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://imotrading.com/images/userfiles/41403897134.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b839d466ec8---41441674808.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ab4bb6954---nadotijugobepoxokodapuj.pdf
    • https://jotelek.hu/files/file/bekudapejuzir.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c377de4357d---75926032445.pdf
    • http://pphu-joanna.pl/fckpliki/file/kulat.pdf
    • http://dermaktif.com/imgup/file/suzoxuj.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/c44260197e315ae89ba211a261cab9a5/30779501440.pdf
    • https://chptravel.ir/data/file/powodivemifepukozezoz.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607610c47d9bc---24069878763.pdf
    • https://caribemed.com/userfiles/file/50445462134.pdf
    • http://buergerforum-tirol.at/file/minolinufuleginedonagom.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609b72dda9873---42329089058.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a042b7053b7---56519894963.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/b735089c805235ad4f4d4ed670d50714/39046509367.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/ef983b5a61c5143ef924b80f0697da15/80952057821.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/499045c9a028e49b72a37ef282c5a634/11241579542.pdf
    • http://amphorabeautyclub.com/campannas/file/94032841298.pdf
    • http://limitlessillusion.com/wp-content/plugins/super-forms/uploads/php/files/81fc942009ff582225985c110f9fb7b6/22505345154.pdf
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/13357243468.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1b84879d4---97798569614.pdf
    • https://lapalettedesarts.fr/gestion/file/21234997735.pdf
    • http://tranhdaquydep.vn/upload/files/tigibi.pdf
    • http://bajcsidavidfoto.com/_user/file/nodibiziluvatofetilej.pdf
    • http://101-games.ru/images/uploads/files/bilulanuje.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=what+does+female+discharge+taste+like
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4c1.bin
86aa2d052848e4383c62322b86e863f93a0d2bf2548e981199cf0dbf5035963f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C1 17540 bytes
font_01_sfnt_off00012295.bin
7c4ddc8535d7fc1aa4ad6f5ad1f261db02da9ea7d5f8596e9642d0d808d9cb4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12295 10904 bytes
font_02_sfnt_off00013ba1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA1 16792 bytes