Malicious PDF — malware analysis report

Static analysis result for SHA-256 0053c1590b385771…

MALICIOUS

PDF

56.8 KB Created: 2021-09-29 04:27:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: c092361b28e60275f4704d40691734fc SHA-1: 74dab8a7b035d730343ef8ad37e554dfe05b3303 SHA-256: 0053c1590b38577120321df6c7768483f257128a91ed385288875869b72c4fe3
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The primary function appears to be directing users to potentially malicious content through a series of redirects and compromised hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7092

Heuristics 5

  • 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
  • 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://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/161416333d698e---74269183663.pdf In PDF document text
    • http://medianet2000.net/amm_prod/image_news_popup/file/tadiva.pdfIn PDF document text
    • http://wwstationery.com/files/file/kitupagivapaj.pdfIn PDF document text
    • http://prosefkuchare.cz/userfiles/78642360928.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/59992580610.pdfIn PDF document text
    • http://101eyewear.com/luutru/files/vusimazide.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/walezibevimowufutonuv.pdfIn PDF document text
    • https://preciseenergygroup.com/media/fodolikonetolifufinusenun.pdfIn PDF document text
    • http://sarica.com.tr/ckfinder/userfiles/files/39031729842.pdfIn PDF document text
    • http://diamant-x.sk/UserFiles/file/pikatetumubifi.pdfIn PDF document text
    • https://linardi.ru/files/file/24982052847.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/feladuparijuto.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614764fd59c71---zoxemusekubojulimatigut.pdfIn PDF document text
    • https://pensionradvanice.cz/res/file/79261284746.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613feeae578fc---natasufonirawenizesaju.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cdce447f44---fikivesuvugu.pdfIn PDF document text
    • http://rujiahk.com/uploadfiles/file/fenoseba.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614656650e894---57840995285.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/80816005315.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161368989c4bc4---jogixesokega.pdfIn PDF document text
    • http://www.cemeba.com/uploads/ckfinder/files/xawowowerupugawititi.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/bepif.pdfIn PDF document text
    • https://zmiz.hr/userfiles/file/nejiraromege.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/52146387323.pdfIn PDF document text
    • https://gedayapi.com/userfiles/file/4973963871.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=game+pixel+rpg+androidPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB44F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC66 10608 bytes
SHA-256: 8e19ebffca9348c2ce411f8d68d6875265ea39f33441e53f45cf4dbdafd78ec0

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