Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a96ed7a5b03ece0…

MALICIOUS

PDF

64.0 KB Created: 2021-09-20 21:31:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 51cc38b068bc2f0fffcc1bd105917c85 SHA-1: 89e493f6b9f4d77b30774ac7ffe5e32be815b867 SHA-256: 3a96ed7a5b03ece048ba695a53d61585118cbb98ab64c3c62e1a8fc669bf2fb9
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign or serves as a dropper for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7151

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://ketchas.ru/uplcv?utm_term=best+emulator+for+codm PDF link annotation
    • https://skywaynepal.com/userfiles/file/41460983794.pdfIn PDF document text
    • https://slide-bearing.com/d/files/fipukawuwez.pdfIn PDF document text
    • http://i-physiology.ru/upload/jupejefoninifozare.pdfIn PDF document text
    • http://permagnet.com/upload_files/file/210912011930713986gcoo10.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/12bjlkrmjmgllqp7418u5lch60/61655193568.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/70064b5f1fef00ffd30ef8684e2c397d/nokoge.pdfIn PDF document text
    • http://ekopaczka.pl/imgbrama/files/repufaxirixabon.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5a53c1eef89521af8d195740b6f72472/26232996523.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/65861966102.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/migegimutufekozetezeda.pdfIn PDF document text
    • https://snoman.mb.ca/ckfinder/userfiles/files/senerafineremofosivaxera.pdfIn PDF document text
    • http://zpkprzemysl.pl/ckfinder/userfiles/files/67167159578.pdfIn PDF document text
    • https://aneri12.cz/res/file/47911805352.pdfIn PDF document text
    • http://studioambienteterritorio.it/userfiles/files/47678507847.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/d9075dee86a800ccee185e5b20e6508d/vopegixufowuju.pdfIn PDF document text
    • https://armour-technoz-ca.otzol.net/ckfinder/userfiles/files/wotetopumugogawepuzuruvob.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/74830809441.pdfIn PDF document text
    • http://nenayu.com/filespath/files/20210906185816.pdfIn PDF document text
    • http://gz-chengeng.com/uploadfile/files/10047239361.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16143e0d677aab---tesumovekuturigavo.pdfIn PDF document text
    • https://xn--90ah6akb9e.xn--p1ai/f/file/dujijirabokerikow.pdfIn PDF document text
    • https://beautifulhairstore.com/upload/files/92679404561.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/xijurekevimotaru.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c84cc0c632---46271413115.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/faragowikizeniwo.pdfIn PDF document text
    • 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_off0000e78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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