Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde9a412d58d0a1e…

MALICIOUS

PDF

86.0 KB Created: 2021-06-29 06:50:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d045937c7c7d36635d2ea5c047d0a347 SHA-1: 9ec2ee73a691c4cd1c49ccbbf1d6850e2db466a0 SHA-256: fde9a412d58d0a1e51a87a3c3a76b881e9a13f613f5735a43e6209c609ea7b75
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS upload storage and disposable hosting. The document body was unreadable, but the presence of numerous external links suggests an attempt to redirect the user to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/7b4345eebe92b4b10d0b3a284655875a/17985254022.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/672jedh3cv4ljpj94sn46io1es/9510748284.pdf
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/f298123f83dd6ebb4bc17f38cb52f2e2/maturofejadepeturiwawov.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/763f1301fad009c285479dd63164eb41/47243808417.pdf
    • http://www.siscbolivia.com/admin/uploaded/fck/file/62941944433.pdf
    • http://hytechplus.com/userfiles/file/jedaxonipaduvogi.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/d7qnkcnsnnh5msiadmru4epfm2/57787078173.pdf
    • http://nbpcpentecostalchurch.com/clients/65183/File/jofapijoz.pdf
    • http://richmore.kr/uploadfile/fckeditor/file/12941829369.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b5c9c8613---fowelebudasiwuwugidev.pdf
    • https://a2designbg.com/userfiles/file/nivumugemoberorugoduru.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/c02189f5e059769641d4bd036b6bb179/gitujodizuwatemuxuzaduwe.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160879b6c70e67---jesixerubatirosoxomapal.pdf
    • http://amadpich.com/userfiles/file/guvaw.pdf
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/40106651910.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/ind1hheps5qhugs00hg1tmu8l4/monusagus.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607aeb1688a23---ravuworizofapifivoger.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a635cc68ab---xemefivisazukijejeji.pdf
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/deb6945a4cab5f977ffe0620882d12be/jobepaguxisiratenoluwiga.pdf
    • http://rld-carbon.ru/file/gizosafanubezem.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/afdc511d17241d4e0dd336bc83504887/gejisuxusen.pdf
    • https://cakesandcupcakes.net/userfiles/files/domaxa.pdf
    • http://sshs61.com/clients/6/60/60e739d5a8cf4a6710e4f064fd99417d/File/zajip.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160b73b2126228---16234366862.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160cce78b9ad23---dabor.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=imo+video+call+and+chat+app
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeaa.bin
bd979eda240a3024e1b9aa15005bad1b34117dd5bace74937c275be8582a45b0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAA 17008 bytes
font_01_sfnt_off00011afb.bin
997c8f77fea3d6ed5a3c39c9df8551139f78a221d692e80230d5fcd974b69027
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFB 10528 bytes
font_02_sfnt_off000132b4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x132B4 16792 bytes