Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2557cede5f520e8…

MALICIOUS

PDF

70.3 KB Created: 2021-08-14 09:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7be1ac7a9e26491f55101a477a46a8be SHA-1: 35047f210774ea70058e0af70f64fdce3bcdca1d SHA-256: a2557cede5f520e88af9a41cb80f0e6c6c44788662ff3c829bb77bd93e340ff5
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous links hosted on compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content or phishing sites. The presence of a 'download summertime saga latest version mod apk' URL indicates a potential lure for pirated software or game cheats, a common tactic for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9405

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://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/2606a8645574105ca4ce7ab772298382/wufovixek.pdf In PDF document text
    • http://www.tokyomagic.jp/images/library/File/ralojeredukurakagizime.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a193777e5a---30801174685.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608066c9c23c8---gajerokavesezipuzorivazib.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160db9b2b1135c---lefefavijiz.pdfIn PDF document text
    • http://studiobaldizzone.com/userfiles/files/kodugum.pdfIn PDF document text
    • http://dentherapia.hu/files/file/mesorobitivuzotud.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/talen.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16116a7c6f05d6---netirusimikedixupalek.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/riwizopujonupoga.pdfIn PDF document text
    • https://keralahappyjourney.com/ckfinder/userfiles/files/fotolevematadomu.pdfIn PDF document text
    • https://vvpta-irvine.org/userfiles/file/detufaxofifusamusu.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107ff85bda61---pusopukopuvigufoboxigutul.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/02bf23102dc023cc9827d9ef8708c309/rifoni.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce0496b83a---volisaxezive.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/69845510828.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/wanuparasawojitubupiri.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/k42m8dk13kebb7plsakg50apue/69281583856.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/karawonizirof.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/8mu6fm9tgtrfl0km5opbk95j53/nelitafilelo.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e20654319f---69479485955.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/461c847fc8ebf984e361d684ec255bfe/12698120834.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f18b47f847---sodekasosadafikip.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/2c4cb2235704f9187a07af3809d4ed1d/mutemi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=download+summertime+saga+latest+version+mod+apkPDF 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_off00010232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10232 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1