Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d9f6365b1aafab9…

MALICIOUS

PDF

84.1 KB Created: 2021-09-07 07:57:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d0265337ad9ff119f115841c29e42e61 SHA-1: d95a0d5450e0a3a90cbf9c692322e4e2c4c66648 SHA-256: 5d9f6365b1aafab9c4f924605769e0537f08b57995f5418a25220a2451e37d99
124 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to compromised WordPress upload directories. This suggests the file is designed to lure users to malicious or compromised sites, likely for phishing or to download further malware. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2676

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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da62d177de---56618623126.pdf In PDF document text
    • https://vicotelecom.vn/static/source/images/file/73476296890.pdfIn PDF document text
    • http://gzky.cn/dubeite/ckfinder/userfiles/files/20210801_104349.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/4ccd6e6d7d8d1f2c4dcd698cd9053e0e/83267460705.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///xilabixi.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c75436b5e4a---vexikufizovur.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/18079670206.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7775a9e95e---17199916171.pdfIn PDF document text
    • https://vinatech.com/userfiles/file/fobuvumujimufijubep.pdfIn PDF document text
    • https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/55439480076.pdfIn PDF document text
    • http://grupophi.es/uploads/files/bijik.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aac22d0236e---fozimubifukokagi.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/jovojato.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c35faa230ff---91290500186.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130f7102c252.pdfIn PDF document text
    • https://coastalholidayproperty.com/ckfinder/userfiles/files/numoximitiw.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/c132932a26b7a53519325c1e83fca770/semir.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e23072844---62248849504.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/15181111561.pdfIn PDF document text
    • https://nhanloc.net/userfiles/file/sabizimiduduwinaka.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4c676a0c7e496c39bfb8c93748dc1cf2/96112366377.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/43123079013.pdfIn PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/tuxikapojupote.pdfIn PDF document text
    • https://12shio2.com/contents//files/jaguzasumegil.pdfIn PDF document text
    • http://1960ihs.com/clients/e/e0/e0b58928a48036c9af8d6cfc9cffdd99/File/nojotoluligumuda.pdfIn PDF document text
    • http://xtra360.net/campannas/file/dukesalujixusolozesizuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=hansel+and+gretel+german+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2C 10620 bytes
SHA-256: 1ae00fdd8a2fe0b2f4526ad87337a906347eea43aa92a7f98a1a890399f167b9
font_01_sfnt_off00011427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11427 20892 bytes
SHA-256: 8c1f1f95b16427fd1c11c6990b3c90394b816c51dce9f2a12bb71485848f2d51