Malicious PDF — malware analysis report

Static analysis result for SHA-256 8544945352e3fb8a…

MALICIOUS

PDF

57.2 KB Created: 2021-09-06 12:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 454a3080922e2261ca98c0acd15b1f96 SHA-1: 35388371f4f15175f0525ea6a706b0371b12292f SHA-256: 8544945352e3fb8a0cf2b1074a50451ff501fd90069150975b146a7721c8dabd
154 Risk Score

Malware Insights

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

The PDF file contains a link farm, a common technique used to redirect users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple URLs pointing to potentially compromised or disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8155

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 https://ajwatravel.com/wheelmarine/userfiles/file/tuwodipedimibuvatetimoz.pdf In PDF document text
    • http://lamexmarket.com/uploads/files/82113282060.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/69cb41772b5e11306b468456852a4ac1/bubidusisugibaxafusu.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c00a09d99---duvixa.pdfIn PDF document text
    • http://zonweringbelgie.com/ckfinder/userfiles/files/rofuvuwutomaruzutawof.pdfIn PDF document text
    • https://ibliberia.com/ckfinder/userfiles/files/vajojulijijez.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081268b423e3---dafek.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/7f41da3f2400e831e38b644d2270f2e7/43084677056.pdfIn PDF document text
    • http://etnorom.hu/pictures/faxudumi.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/gesewom.pdfIn PDF document text
    • http://mytrangroup.com/uploads/userfiles/file/74073305429.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/zevadupekonotivalimuva.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/36307494177.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/zowofizofonosivag.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/zanapamegiv.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cac03bea0ad---wikivakazagidu.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de4a0d5573f---marafedenetupugakuvu.pdfIn PDF document text
    • https://marbletreasures.com/uploads/image/files/79286346638.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/71aab1644812935ebe8d93cd9c371bae/robisudolosixixefixuf.pdfIn PDF document text
    • https://aljazeerahdrilling.com/userfiles/files/dosufogud.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd5c8d59f9---jewujosalagisana.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160708e342a451---dozigedipofinuvu.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/d67b6ad0e3b170b4a1311aba461c8d62/38948535952.pdfIn PDF document text
    • https://www.totalblissbeauty.com.au/application/third_party/ckfinder/userfiles/files/tisudodupamilizotagik.pdfIn PDF document text
    • http://erfaspot.com/resimler/files/xodomabox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=trastornos+psicologicos+en+ni%C3%B1os+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB743 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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