Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f1232856ccc4624…

MALICIOUS

PDF

70.3 KB Created: 2021-09-04 23:58:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d415cb679c1238d27a7bfed83454d117 SHA-1: af6ed9de84cd8c6351ef3f0c0441f76a2811e0f0 SHA-256: 3f1232856ccc46240ec0db00bea42404d87b2a64f401e1fb3652e5661cdc783f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to other PDF files hosted on various domains, many of which appear to be compromised or disposable. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or SEO poisoning campaigns. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6865

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://cartopack.com/Images/file/konivagixivixuzozir.pdf In PDF document text
    • https://stdtekstil.com/upload/ckfinder/files/53558162838.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/38918575989.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8bdc58a9c6---13861759145.pdfIn PDF document text
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/23747465318.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/d792ffd83938347875de601454a3625d/55829421789.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/91941453704.pdfIn PDF document text
    • http://zonwering-nederland.eu/ckfinder/userfiles/files/11586497368.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2036d89ce3---vinokexinagudiruwi.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce3ea08987---bevorurukabokojotelizosa.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160d78cc0d0c90---73513779150.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/kasaja.pdfIn PDF document text
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/3eb619fadff29af4435e41c25f966a09/11240629109.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9e0babfe3---55192000394.pdfIn PDF document text
    • https://eetravel.net/file/71325109162.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b8fdf064435---zevedaneramapafedixezipen.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/qv4ts19qi8l7plsqc4rkkok0tf/jijoweweme.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b37a3da615---kivumijawolo.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021081512101475.pdfIn PDF document text
    • http://artediapharma.com/upload/files/77016977982.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/59443272506.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/32469810031.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/55996638196.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/lujiwapabosijonufi.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/89cu02mfg0jdr8sdj9li3pnnkv/66363812011.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/o2f3bcndu1irrr54b6g62npq01/35659041814.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/79bcd2d11ac130b1ed92e5d5f2bdfcf8/38346840758.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=organizational+behavior+ricky+w+griffin+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_off0000e3a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A1 11312 bytes
SHA-256: aaa1b5e91cdeb8edd94b491ee1b5c3098d2e43c9c74c8e108bfa13fe8a394a07