Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f3c6e1a321ee7b8…

MALICIOUS

PDF

78.2 KB Created: 2021-09-13 02:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 249147a56c1936a9508eb828ad288d9e SHA-1: a8e00bc0d94263d00de98b25507ba76857c21ba8 SHA-256: 1f3c6e1a321ee7b8d22b5ce182b876e22cefe0023e3223f9acab3469c423a3c2
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm, with many embedded URLs pointing to various websites. Several of these URLs are hosted on compromised CMS platforms, indicating a potential phishing or malicious redirection scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4578

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://wsp.pl/userfiles/file/tovuwedepetonikamun.pdf
    • http://pyramidplaster.com/file_media/file_image/file/pejivemorarutaji.pdf
    • http://righetti-ticozzi.it/userfiles/files/42537711298.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3a40db315---43038665959.pdf
    • http://ristoranteibucanieri.it/userfiles/files/69019727874.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613db923276b0---nejuludagopumoduwaga.pdf
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/tuniluvupepu.pdf
    • http://danieldesignpro.com/userfiles/74508871005.pdf
    • http://deeringbayrealestate.com/userfiles/files/82303407522.pdf
    • https://leo.tw/upload/ckeditor/files/90193062473.pdf
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/juxidufexexagazenik.pdf
    • https://yarpaket.ru/userfiles/file/50609725492.pdf
    • https://blv.by/upload/editor/files/23275470891.pdf
    • http://oasis-inwaste.asia/files/file/sodegoluvemukol.pdf
    • http://princeworldwide.com/multimedia/userfiles/file/vinavugomizoveloj.pdf
    • http://soosanfix.com/upload/fckeditor/file/46512064375.pdf
    • http://greathorserider.com/ckfinder/userfiles/files/48755968604.pdf
    • http://medical-1669.com/userfiles/files/49673582132.pdf
    • http://keralastatetailorsassociation.com/userfiles/file/puwikisegalodavaxukevugo.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7d9469f5d---sasekelejexepa.pdf
    • http://pomodorolennep.de/gfx/userfiles/files/nupogotuxid.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/fime3d5b5svs1a0853bs42iok3/25230500298.pdf
    • http://inggeo.eu/userfiles/files/fetosapilogumewopipimu.pdf
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/nujinowezamusa.pdf
    • http://lnv-cnc.com/userfiles/file/bujubugavinawo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=wpa2+hacking+app
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e79b.bin
ad30194f7ee60118c2dce664b69522cff68b44593a6d97df8ad69bea41eaf608
pdf-font-stream PDF embedded font (sfnt) at offset 0xE79B 10196 bytes
font_01_sfnt_off0000fe74.bin
5f85383142678003c5c702d641ebc227765b1181ed182ca8ea0adad50bd5965c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE74 18140 bytes