Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e2623330f600f2…

MALICIOUS

PDF

86.7 KB Created: 2021-07-05 08:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 45df359679364a5471e304a6bc23f2e1 SHA-1: 18eef10e9f11f4952197f89fcbbb06dedc3056a7 SHA-256: d3e2623330f600f203500584844582b0fd32f707c41bf708aa2ef5d89ae6c4bb
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains a link farm pointing to compromised WordPress upload storage. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates that the document likely provides instructions for a password-protected archive, a common technique to evade gateway scanning. While no scripts were explicitly extracted, the presence of PDF_URI and embedded URLs suggests an attempt to redirect the user to malicious content, likely a phishing or malware download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086f618551bd---rozatebanodiguf.pdf In PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/u0dqfhnpb41olqhgbksds9r7mr/dolufaxifusoju.pdfIn PDF document text
    • http://orikon.net/Images_upload/files/bolejugabejisoni.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16078b859e1ed1---17298993238.pdfIn PDF document text
    • http://pgnsualumni.com/clients/872691/File/wabobuxonubetavunusuba.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/57f6cc134443055c42d1c66aed85a84a/medefisagulusewewapo.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/c6f02786329a721f76e831674096aaf6/80990882369.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/nhi7m5pajtbnspd28eorj0i31c/xatuwosunepuzixi.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ce6761674f3---moxiwekalejomovapaboguwe.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3fd3de01d---92425099365.pdfIn PDF document text
    • https://prcomponents.com/ckfinder/userfiles/files/nijudowanisupubu.pdfIn PDF document text
    • http://champagne-marc-chauvet.com/images/files/43070879321.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/8222661415.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e04d3757f---79342939095.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9ce0e22119---fataf.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/bonufubif.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/e08d9532a0fc32da25ba1a03a6b3a13f/78044896317.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/tgars0lotccl15jk74qfh6sr30/20959047942.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/gugatugap.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/d062cjmcbaj7tur3egkh8bmus3/radugusikepu.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/zikakadujilosurojujip.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160af85faca533---48857744306.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/dogabebiliwobovuwibu.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/metopesulakimaduf.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079db8b29e5c---kozapumusotijirun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=adobe+photoshop+cs3+portable+free+download+for+pcPDF 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_off0000ebbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBF 18040 bytes
SHA-256: 92bf3937ab9e404a3aadc05f1b283f7d276421918064631d24900d1ff2c54b34
font_01_sfnt_off00011b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B93 11004 bytes
SHA-256: 95b1e8aeab70d62844c536833dc842524bf29a3f5834d19cb414018a674f14f2
font_02_sfnt_off00013508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13508 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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