Malicious PDF — malware analysis report

Static analysis result for SHA-256 aafda7766c3380b7…

MALICIOUS

PDF

69.3 KB Created: 2021-09-24 06:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 214c4a896c657340fabe5730869c5d3d SHA-1: dd5f66b6687764371d0ea8ddfa400b445a143f6b SHA-256: aafda7766c3380b7dc5df8a888931a99233853e88a623428f1a5d8672f81ec43
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 ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. It functions as a link farm, presenting numerous URLs that lead to external content, some hosted on compromised CMS platforms. The embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9135

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://pistant.ru/uplcv?utm_term=fighting+fantasy+out+of+the+pit+pdf PDF link annotation
    • http://52963566.com/upload/file/202109101100203085.pdfIn PDF document text
    • http://creativecoms.net/userfiles/file/gukavuberop.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a90d5d1bec---66472817216.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/fr5r5k0bo8rka2eloikk6da9f7/tulamexonovupego.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/56381500463.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/9224688471.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/7b5c034b228ab629cbbc43abc10cd004/dusofutukedijuwafikuboluf.pdfIn PDF document text
    • http://koreaseals.com/ckfinder/userfiles/files/46141451909.pdfIn PDF document text
    • http://kht.civilkozpont.hu/uploads/file/41583240184.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/simizepanepobasadin.pdfIn PDF document text
    • https://md-bud.pl/szklo/photos/file/kilobezisip.pdfIn PDF document text
    • http://satunatc.ac.th/ckfinder/userfiles/files/bagowuxina.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137b6590148a---75375075692.pdfIn PDF document text
    • http://cwesp.biz/upload/file/melat.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/3337104574.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/sexoretasoje.pdfIn PDF document text
    • https://thuaphatlaihanoi.net/uploads/files/29763328865.pdfIn PDF document text
    • http://hulstcustoms.ru/uploads/files/bomazivutegisemese.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/efc4d74e2cb7854f9e8209b4284f1888/47560751669.pdfIn PDF document text
    • http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/keludotanotupel.pdfIn PDF document text
    • http://healhumanity.foundation/userfiles/file/6129475364.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/48139221356.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16135f7b2429c3---72781038176.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/5505887442.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145034c8c9ea---vakotow.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_off0000dbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD7 18828 bytes
SHA-256: 581420ec12f1434a64e86847fe343e2ade1169d9a8204ec5c7962b88db81db47

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