Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e30ffcdeb1b2db…

MALICIOUS

PDF

85.1 KB Created: 2021-09-06 10:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9f26eb8ce3a4a558afc970e4b544f975 SHA-1: a10d07430ed5b2668239d5758de42acdf1f1df01 SHA-256: d7e30ffcdeb1b2db82fd867c6c59a154caf33b9b11417e441070b56a992f05ed
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript and numerous external URIs that point to compromised WordPress sites, suggesting it's part of a phishing or malware distribution campaign. The presence of embedded JavaScript indicates potential for further malicious actions beyond simply hosting links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://archism.ru/uplcv?utm_term=bca+8+ball+rules+pdf PDF link annotation
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/kelobutixowafiw.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/905e4d52a425245d3ef074265f98768e/45976863081.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608026808cff5---wirezapikebeguterokimuvax.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160fb1bc968e28---gafigituwabam.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/3c0261920e271f4f6761efbd4abac432/71010306884.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/07158a2e41fc3928dbaf4bdda8a88e3b/3998249872.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/pidavufidelijilutitur.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///60417860804.pdfIn PDF document text
    • http://hourinkan.net/js/upload/files/90026586716.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/e2c5b1a56a38d1661bb32c1c8fcc9e19/lifanusinagudotet.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/69221970111.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160aa447eac6cd---48140917592.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/c60722327c61ae85531daf3454a1dc75/39457182569.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/wimam.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/383e945973fbce397eeff74d423736d8/merediwororir.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/zofadonezaxokodugaduwode.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/22dfea9777467034f12cb48befc0b5bd/ziwokokamitibadufuku.pdfIn PDF document text
    • https://fwullong.com/upfiles/editor/files/retedagotuwan.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/napavalelujelerutegakuneb.pdfIn PDF document text
    • http://mileschapelcme.org/clients/9/9b/9b85db73e8c1d5ae3bc18b6db4f26039/File/2515357356.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/15477812338.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/lipejamorudivipudit.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/fubozuviw.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eac5176f6c---zukosadufutur.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/80221733335.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_off0000e6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A7 18144 bytes
SHA-256: 136704a2bf70adc9a37fe3e26ef23a1ec90791f5df4ee06e3d0d26934ff34869
font_01_sfnt_off00011611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11611 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E28 10700 bytes
SHA-256: ff6862124e80ab3fe8de7e2271d439afc0688ad95e1a1551914e8387dcb352b6