Malicious PDF — malware analysis report

Static analysis result for SHA-256 9364a5f9859886ee…

MALICIOUS

PDF

80.5 KB Created: 2021-09-08 07:24:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 8ce86adc3266e1ac1bee80bbc29d0de6 SHA-1: 4156dac222c54287adb93abea90b2c841d05311c SHA-256: 9364a5f9859886eeebf8a0740c39102eaa08ad6e0e1d1c896c3c77231d5f74a3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7217

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://casms.org/atts/news-files/file/97700090049.pdf In PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7fe79d2df---pexifubufupe.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3aa1111908---88799439921.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/pavixutafofipu.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160939ea37cd0e---29351324710.pdfIn PDF document text
    • https://bobecoingatlan.com/uploads/editor/file/62817234370.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/46562251612.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/xijunog.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/c04470aa7ca70936b51aa67f25a4a5ba/28145193078.pdfIn PDF document text
    • http://boissee.fr/userfiles/file/tiramuzogukobidinajaxel.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/18737095254.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210623014222.pdfIn PDF document text
    • http://www.pilartangguh.com/file/74237803039.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf9007a093---duzexufadoxiwusegi.pdfIn PDF document text
    • http://gzperson.com/uploadfile/files/68623691097.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/xonuvodud.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b5ebf05ec---terodolorosisovetanu.pdfIn PDF document text
    • https://tkquiz.com/userfiles/file/fokoxevik.pdfIn PDF document text
    • http://hairtransplantmangalore.com/uploaded_files/userfiles/files/mesunabasaruzavumug.pdfIn PDF document text
    • https://senfina.top/uploads/files/nitisovoga.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160740c8f5691f---3141045694.pdfIn PDF document text
    • http://portakalweb.net/home/portakal/public_html/ckfinder/userfiles/files/80162492592.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/danavetu.pdfIn PDF document text
    • http://ctmmaximoravenna.com/ckfinder/userfiles/files/ruputi.pdfIn PDF document text
    • http://ilkemymm.com/image/files/69393517497.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=the+potlikker+papers+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_off0000efc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC3 10548 bytes
SHA-256: 3790bc0ea6224acc2368e02a122378cd81983c1449ba9d5cd5df9edef019b9ed
font_01_sfnt_off000107ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107ED 17676 bytes
SHA-256: c012c5f6444e578006b4a733a5b933018aecb27e60226af2ddd51085a8a3131c

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