Malicious PDF — malware analysis report

Static analysis result for SHA-256 122eeaf2120ff114…

MALICIOUS

PDF

72.1 KB Created: 2021-09-17 17:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fe339bf2d146cc8c6fead19a0cef8930 SHA-1: 925b440bd9410b6b68a8addabd11722c7f5fe29a SHA-256: 122eeaf2120ff1141aade867f24507345dbcbf3c07366f67bcfe5f3a04febbd1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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 http://jolanyee.com/upload/files/202109141605264981.pdf In PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614333c856809---42593441726.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16141c3199a497---88281528716.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613612dd9f997---93764064957.pdfIn PDF document text
    • http://fese.in/ienupdimages/images/files/44337953062.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013new/admindia/ckfinder/userfiles/files/60753473023.pdfIn PDF document text
    • http://pvvc.cz/files/53968127174.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/14963117528.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/zozujaxulusuti.pdfIn PDF document text
    • http://sandlnae.com/data/editor/file/38493074304.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/12111116381.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/32512118243.pdfIn PDF document text
    • http://staceyasp.com/UserFiles/file/sojawotokavabewowo.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/rorewo.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e0b0db894---wuwekorib.pdfIn PDF document text
    • http://ofitecnic.es/files.ofitecnic/fck_up/file/vetajetebivalonofawugisa.pdfIn PDF document text
    • https://cv-vezouze.fr/media/file/vupabijapuvutipeka.pdfIn PDF document text
    • https://triatlonshop.cz/userfiles/file/65456957379.pdfIn PDF document text
    • http://hankyunget.net/userData/board/file/29399026692.pdfIn PDF document text
    • http://westpakusa.com/phpsites/vertical_living/uploads/file/dobarupimidi.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/d17788084ba147ce70d8ae345c046d8f/rimilanaxijebugudisupiwum.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/xevisixaw.pdfIn PDF document text
    • http://dailygameresult.com/editor/UserFiles2/files/26652201651.pdfIn PDF document text
    • http://wellnesszeewolde.nl/site/data/ws/files/56615985873.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+long+does+uncooked+chicken+stay+good+in+the+fridgePDF 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://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_off0000bc15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42C 11136 bytes
SHA-256: b93544b602bef236aa15deca0fceed33f866b2eb452bb177eee7086f7f44b016
font_02_sfnt_off0000edf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF5 15408 bytes
SHA-256: 21d52d6c66bff3ef9cac379134c215f6f8b9435683a99c0e630a4cc7d565719c