Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce46896cc12069be…

MALICIOUS

PDF

85.3 KB Created: 2021-09-06 20:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fee8311e0b2936ebcc055f9ed6db2aba SHA-1: 267924bc454ccd810aa254a919544830d53dc13b SHA-256: ce46896cc12069bee825964a8c6bc88eea8d7833dc37da470060f09dd414ec5f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of links, many of which point to compromised or disposable hosting domains, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL heuristics and malware detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://lifo-sea.com/ckfinder/userfiles/files/tolima.pdf In PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/9ktv8jhn02kkmpvh7nqpabjju0/rivasexipazog.pdfIn PDF document text
    • http://uppercanadatwocylinderclub.com/clients/877835/File/38030508297.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b095dce061d---xawani.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3e0e7426f---83978737431.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/67706505503.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d83543b71---9337369270.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d62263c67e---89998130289.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f6471e44035---buwolusuginawawe.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/d69246b1aa9dd245dac12662e08ab751/funowabid.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/2e2d42fbcc8507f5802fbcb0c698e2e1/52857716467.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/ipsm9g6vglhq21m94mjbsm40fq/ganup.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/924898f568e225fef60dc348cbee20a0/79114118482.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/6133b464d52dbf4cd1895cad68f24297/namiwi.pdfIn PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/rilukulamugepidewegi.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/318fcb2d3786ad133a2dd98e661c099e/9115961098.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/ff597b5aa3d82d27c80c3b1517c3f349/vusonepafoku.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1608607d5bcbde---wefodobupomore.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ff7a8343e6b---pakafogiwuvovebedunu.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5c9c39b91---sazerufexo.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4faed8129---6108743955.pdfIn PDF document text
    • http://guinyardfamilyreunion.com/clients/62985/File/pefitunimi.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/6332341839.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/f618r9nl1nimh8u6did8ko3a71/nidujeporud.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/98c57458c5b0e556c6e15268340372a8/jijopadagijiperada.pdfIn PDF document text
    • http://hondatayho.vn/images/ckeditor/files/fevuzu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=spdf+blocks+on+periodic+tablePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE690 18624 bytes
SHA-256: 0bf628b5e01e05110b4202de98e6fe6639de17f71772ab5ff6198c0e533cb72e
font_01_sfnt_off00011610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11610 10920 bytes
SHA-256: d644e5c34a51c6293c94ea0f90e98938b0a0bd204a44b01876c1e34dc0204054
font_02_sfnt_off00012f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1