Malicious PDF — malware analysis report

Static analysis result for SHA-256 bffb56ccd892378b…

MALICIOUS

PDF

63.7 KB Created: 2021-07-24 04:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3c5ec8d9be3b413949ec243fe3428452 SHA-1: 88c61228dbb16305ef4bbd86a5e9c68b17e2df8d SHA-256: bffb56ccd892378bc82b324b8c5fcfd502345c194f09e6982c97a31ad4a3b715
94 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading further malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous links on disposable or compromised hosting reinforces this assessment. No scripts were extracted, but the structure suggests a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9693

Heuristics 4

  • 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://j-club.eu/userfiles/file/17982748197.pdf In PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160adf30063e59---wubapopemexajejinuregame.pdfIn PDF document text
    • http://vantaidongsaigon.com/uploads/files/sizixixiwozobuterame.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/d6b152f59469f5759c15451155372a51/79459745607.pdfIn PDF document text
    • https://digireg.it/upload/64173882301.pdfIn PDF document text
    • https://zifu-tech.com/app/webroot/userfiles/files/88711562701.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/wukesovonug.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210613205517.pdfIn PDF document text
    • http://sodrex.pl/userfiles/file/30723105621.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/28254477448.pdfIn PDF document text
    • https://banghenails.com/upload/file/lolaviwekigudufej.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aaad36f2be---salesoxowikenewate.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/52921123213.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/degejadabavekejixaget.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/22edf7413865a39dab39b70dd25ee8fd/15956966245.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/8ca6d90abab9e295b640e6cfc54bf789/wiwukokuva.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kaledekatebizabap.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d513053635---jizidemoxejarawo.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160974ddfac7d7---16846386739.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6f2f95a9d---monunixipiminawajubejojir.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/tva9m19dot2k9ev1ne0gtm4kre/46037155407.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/bc6f41532b4f011bc9aadd55a73965f0/71237293306.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=death+dungeon+demon+hunter+rpg+mod+apkPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/3ecda096f67c32da3a8ec11b1d698219/junitev.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF267 3856 bytes
SHA-256: 969e9e3136239ec079bf1e8645f379ea8add8e51ab67c11772ea8a42273cae28

Open this report in the interactive analyzer, or submit your own file for analysis.