Malicious PDF — malware analysis report

Static analysis result for SHA-256 826976e3e96f0306…

MALICIOUS

PDF

82.5 KB Created: 2021-07-27 01:37:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2cc063be890de6d54435d9ce1672e807 SHA-1: d33d4aa998beb0fb90d0136b5e3b3ca930c25fa1 SHA-256: 826976e3e96f0306c57e93f187f057153eda6dba2738adb6e9c9ec10d8c0102a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised CMS upload storage or disposable hosting, indicating a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery via external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9699

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 http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b070a93171e---fisazeziso.pdf In PDF document text
    • http://cochu.net/resimler/files/91315697875.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/caa2520557dd32f20c7f7ead86c3de37/87724653216.pdfIn PDF document text
    • http://armanetti.com/images/vatelus.pdfIn PDF document text
    • http://hanauhrova.cz/files/43494360871.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/7ff4e159eb6786de2e5b32ba5ddc3fa1/45201967386.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/70511569752.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d9e6efab8---fusexexapuzegasutitijireg.pdfIn PDF document text
    • https://esz.jp/img/editor/files/61955010387.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c66d939ccf1e3b441692093dfae110ea/temokinepuf.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/gisidoseworateniluvoxe.pdfIn PDF document text
    • http://indecomavo.pl/inc/bukatotakoteretemadixike.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/xiladibe.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/02gj1mus1sfjajddg99uab3m17/32891838717.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a81426663---18935494650.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebb94b7b16---71692518206.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/85fc2s1fbtl9t139atsd8loh1c/12273844526.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/f75a0979de178d90c938fd4aec44042b/vazulanaforo.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/neriz.pdfIn PDF document text
    • http://donaldbermanmaimonidesgolf2021.com/clients/0/0d/0d43fbb8ff91cab41fa1b056c0d912a9/File/zolosoferu.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/c017306fe37d95a475faf81ef09f0efc/vowutozibebesolive.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ff2c2ca357d---wexakajederojudufunig.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/ced47a7ee6e513bfe91457a91f863d8c/77266708201.pdfIn PDF document text
    • http://skyline1968.com/clients/74864/File/58205393101.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/ikuc24hl5jofh7j13coga661e5/48816795735.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076092d25aec---penukivajo.pdfIn PDF document text
    • https://fotoprint.lv/downloads/file/zanimaxifoxo.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/20997447138.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=crows+zero+2+full+movie+free+download+english+subPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27F 2104 bytes
SHA-256: 3932f87ceee845cabcbe63e88f674beb92377c5e12faa5363e66165783ef4676
font_01_sfnt_off0000dc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41E 17356 bytes
SHA-256: 6b9646dfa0cf0ad528f267ba28d0fdcba421e5fd81077001ed0d337f6f7d60e0
font_03_sfnt_off0001212b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1212B 11308 bytes
SHA-256: 3840a0aef6ee17cba3a93050399977eb506eb08d0aebec01c1b2a3a2e46c6413