Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d98ea9eebcaff4a…

MALICIOUS

PDF

88.7 KB Created: 2021-07-13 17:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ac92b64bb27dbb1b01ea02c05a396bfd SHA-1: 6bb784cddc3082b7e3277669d7513bf60781a6d3 SHA-256: 6d98ea9eebcaff4a573fcdeb539665ee2b3582106be098a9923b90935cf83119
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8656

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85f6ec4538---xotogegadajomagu.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ffe101aa1---nikisinu.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/rr7sdo0not30285k934l0avbp4/3218146349.pdf
    • https://ludifrance.fr/userfiles/file/54309932013.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081058c2823e---76362248213.pdf
    • http://drprdesaihospital.com/uploads/bazepow.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16084bda7e245e---todurukabakunur.pdf
    • http://ck-kutnahora.cz/gais/image/file/nerubowudukalizufapide.pdf
    • https://ustunbilgisayar.com/userfiles/files/tofotutadulenofol.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe01107dbc---fijazorelibegeboxovum.pdf
    • https://dailyiat.com/html_upload/file/25329885700.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/6ci0ia9voiuvo1ltcke9q4sip0/60839328566.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/60e102fd56a8dbffd734a399d08508a6/89002965409.pdf
    • http://reutlinger.pl/userfiles/file/sawot.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/6894107a7885af0ddc059cf494d87251/sexagikegopuwubuxetogif.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc5a1b0407---35360250989.pdf
    • http://mizuho-co.net/file/ck/files/xasojojewiwazukamibeza.pdf
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/62549155817.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1606d84afe5b2c---xovavubotufenu.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/9c8783ff488bff5f1f0c4770ae0d9668/newenamonuwitixovasoke.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d8cc24fcc---jasuriz.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de110490c7---40691756401.pdf
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/72b0ae2a50a05d899d97587d80135336/bidobonediz.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/i097pejnhbl204u9ndtor7b2p0/72081541876.pdf
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/177ef280b5d54a08bc6cab3a5102c5dc/bigimuzagivos.pdf
    • http://www.iece.in/userfiles/file/wuroworixaxuf.pdf
    • http://vizesblokk.hu/files/file/jubigoloxewasusego.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=dempsey+hill+cookhouse+and+bar
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeb8.bin
e9a704d00dd6e8ff808373eafce3a9164bafc01e3896b7f7a96cfc50231b2c9e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB8 16392 bytes
font_01_sfnt_off000104e9.bin
619a0542e33d9d567ea33d86dd52a0b1722ece3b1a608f59f7b82721e90e298e
pdf-font-stream PDF embedded font (sfnt) at offset 0x104E9 11128 bytes
font_02_sfnt_off00011e70.bin
9d57b7cf39d6a350ae001225d561dc599271844438e6b2f9417e9fec85b6ceb8
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E70 17296 bytes
font_03_sfnt_off00014c2a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14C2A 16792 bytes