Malicious PDF — malware analysis report

Static analysis result for SHA-256 3567aa6dc0d8c738…

MALICIOUS

PDF

80.8 KB Created: 2021-07-02 15:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: a6225d28086f0e4b15ceae782c446a1d SHA-1: f2f57126a2f3e8d6da255b41a839a49c8fc73430 SHA-256: 3567aa6dc0d8c73803e4b1871e63cba75fcb4d70f837d3614f5413c7b79432c5
196 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a payment redirection lure. It contains numerous links pointing to compromised CMS upload directories, suggesting an attempt to host malicious content or redirect users to phishing sites. The presence of multiple links on disposable hosting further supports a malicious intent, likely related to financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/8011bc08b280622a5ad9fd020cb9d346/86819210629.pdf In PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160b833d4d5a60---nanusijasafexom.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/c93edf1f280b8c913606f95ab776e3a1/kumewemagu.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/29230270722.pdfIn PDF document text
    • http://thebaileyfamilyreunion.com/clients/6/6f/6f45d7e5c9279c15d0bd3a3fa6949618/File/48722537642.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/61352663382.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160716cc69031c---29300523301.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817fa1b6922---jinewibixanozanosokitado.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/kum2rer83ttavdg7grm288vsh5/69838968388.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/gowipifalibedutub.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/pukozobejotapupixetima.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d8ac9ece3a3---74738226870.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607a95d79ac3a---16180905514.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebab1e98f4---vafovufanodede.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/lunalenitipaxavezaji.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/09bb003abba57a132b177320e3c51386/69543329543.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/xanadixofovawi.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081075c77c1a---tokoko.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/u7ud43hrofh6rqn8at16amlmpg/7750680520.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210525012507.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/02k4ih2r4ggiilj9vufsafecq7/63057818557.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/qatgk98a1chclvm6pq5mdn2an8/domusitunubudoxerufosakew.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/71861486793.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0cba2e50f---15849046521.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+transfer+money+from+my+bank+account+to+my+cash+appPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA68 11132 bytes
SHA-256: 4f478e6d9548e8425aa963d3dcaac9b0f4de0e59c1540afb1a72c9a5c4099709
font_01_sfnt_off0000f415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF415 16012 bytes
SHA-256: f95e8459a2b521ea5cbec7d22bdf4e877ae493e27613e4f2410674efc1fa778d
font_02_sfnt_off00011d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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