Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6d1059b1f2bc4e…

MALICIOUS

PDF

86.9 KB Created: 2021-07-05 02:49:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 50d95cb62a56cd2c9562cbd7a4c5631d SHA-1: 7467dcc09c152f9e7c94a3d31adf7559357c5934 SHA-256: ce6d1059b1f2bc4e20d3774e72f37065a7e40d7491e363e267209538d4ca8633
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs that form a link farm, pointing to compromised WordPress sites and other domains. These URLs are likely intended to lure users into clicking and potentially downloading further malicious content or submitting sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://oniceh.ru/uplcv?utm_term=words+with+mis+root PDF link annotation
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609edd0b6af1e---kuwutizuwum.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/reduferarudekewal.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/mozumifesujojufin.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608501d69973f---67842797798.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/c4785a6c290063ab308b6b3df5fe199e/befawot.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/87885036855.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/kagikit.pdfIn PDF document text
    • http://vaughanreunion.com/clients/7/7c/7cfe0b8ff6d5e3136a6575a9b258a09c/File/topated.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c631db8995---90391465204.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/mebumokuvatadenoxeri.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/71342127240.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/f6b036fc55ce2c3daedd003c1bb07904/genexaramokatosalusizo.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/farudijekadexoposig.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/44556891563.pdfIn PDF document text
    • http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/ledakavabolodovafumozeve.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609f303d01d63---bakufajuvajusunu.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/dosopitej.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/43846267446.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160899e7601457---88085503096.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/19877738712.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/5d51350a4b691f80e9e2720c397b25eb/62092683114.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jakopuwopo.pdfIn PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/87153803741.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/92251875407.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_off0000f2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF3 10148 bytes
SHA-256: eddfa03232ba64333b64e636c01985d00ba2669830adcef4143db6e63e36d926
font_02_sfnt_off000121a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A6 17284 bytes
SHA-256: 637650d892c777ea02fdd3d4e9947dddd8a72fd829122fe9be54210ecc7c5721