Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5701c67ff6815b5…

MALICIOUS

PDF

83.9 KB Created: 2021-06-27 08:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0c38abe87f14972a4e8d0150ac17cb6a SHA-1: 6fec8655e325f4ef44d52ce4bfb401bedd807b7c SHA-256: d5701c67ff6815b50e25a6c4f2cb5b4a1f3ff717aeba145c038e5076418f988b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the nature of the links indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://irlanc.ru/uplcv?utm_term=pokemon+fire+red+cheats+codes+rare+candy
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d6ba3b006---wufipalizaxafituxubafuri.pdf
    • https://beautyyaurient.com/editor_upload/file/43470165724.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a453649ee8---kaniwojaluza.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16082e3605a6e7---sewalenuropupulen.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/94517b7b23be67d6442bbdbae892bb83/70589573113.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b850832f90c---vudowakekoja.pdf
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/57ae3077c6f2a4102a59fd9ed835056a/88486285298.pdf
    • http://physiotherapy-warwickshire.com/user_file/file/5932984240.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16086edef177e4---kovovuripavurafelo.pdf
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/qc7fa9pfq7lbaei654so1igt06/lelopilaridaf.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607635eb28b72---tutalezavirikuragedipalol.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/e562c128ccffae9a1f0008f9716e9810/mademuviko.pdf
    • http://weddingdiy.cc/uploadfiles/files/20210604_075501_9729.pdf
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/jabaxixuvoxoperufoxosixis.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160889d32e414c---28583930682.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c74a37012ed---38009232617.pdf
    • https://aneri12.eu/res/file/jurixavorin.pdf
    • https://cambodiadriverservice.com/userfiles/file/91208074812.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/4f986d1fc49efc23d519a768212cbd78/14995219570.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1607e979e266c4---45777626606.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/5193b0f9cd0d033eab3d4296c9731af9/vepaxogatixedo.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/cks2es2dsc629rbrrhfu94buo0/50798862827.pdf
    • 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_off0000e916.bin
22ee0fec8daf49b0b0ba20006fe9620ce50129f535e8cc6016dc9b3b3dc02403
pdf-font-stream PDF embedded font (sfnt) at offset 0xE916 10904 bytes
font_01_sfnt_off00010232.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10232 16792 bytes
font_02_sfnt_off00011a44.bin
e9cc630736dc0494d313bf300311fcf878e2264924c3c31f90aac146cad58174
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A44 15652 bytes