Malicious PDF — malware analysis report

Static analysis result for SHA-256 22afc23416e817e4…

MALICIOUS

PDF

64.0 KB Created: 2021-09-07 01:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ddbf9d88553556a224e0fdcbd36f5e47 SHA-1: 0eab54cd09d0407ad7074938457e41f67824d775 SHA-256: 22afc23416e817e4e7b96ccbab5a550781df6755ed4dfe221985d14e7f5d9f14
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. Heuristics indicate this is a link farm designed to lure users to external content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7100

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://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8654dc3795---sebokiz.pdf In PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16083a91e93fe4---najimagajilafoxopar.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/0diq3qdb62boesq58iucp1s82e/najesitut.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113d4de5afa3---38138741923.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce69f548cbb---purafotojepanemikuvibitus.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/51186455965.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160eda2e199853---18288391042.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/32145109195.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/barabupidanevisixas.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b146324e1---lakedamudejurufokogakexo.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16115c4132ef01---14310621802.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160905bd518f94---46924427479.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/cvbtls9dm4iosoivionppvt844/29962982804.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/b316e01942dcf65c404aab6b0b49505e/xumomofel.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05156f2a7b---xinazewadesimuwulumazija.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/5ba895f82a7f44d5ced2e5281fafa446/fizozamunaz.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/mifodezetorafoluzo.pdfIn PDF document text
    • http://www.superior-inkjet.com/login/ckfinder/userfiles/files/16090324035.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b029d66df---xaresitavebomozoxiti.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/52246118441.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b74dc4859e1---soxawapelaxisavajagin.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/topilepejerofut.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/sibaduba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=rosin+modified+phenolic+resin+pdfPDF link annotation

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5B 1860 bytes
SHA-256: 562d39cc93351683f3420870a5578826c1285db13c691c08f99be18f4980e560

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