Malicious PDF — malware analysis report

Static analysis result for SHA-256 07be8a3d3227a34b…

MALICIOUS

PDF

49.8 KB Created: 2021-09-25 13:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e55fcc467df47f811df59965a1ce52c1 SHA-1: b25bc59303cdc07dda1cc0da1b88fe374fc0658e SHA-256: 07be8a3d3227a34b85bcf633a20080102237d00a50fdfa3bb2e4b9ea6d78cee5
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF that employs an image-only lure, typical of phishing campaigns. It contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or appear to be disposable. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8724

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 49 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://helices-evra.com/userfiles/file/26755902116.pdf In PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/161346c4c36e75---vemofunomogikixifap.pdfIn PDF document text
    • https://shevian.com/images/file/jewun.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/65630591989.pdfIn PDF document text
    • http://resurrection-life.net/userfiles/files/velowaxofizerebajug.pdfIn PDF document text
    • http://www.nomorcantikjoss.com/file/sanev.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/4256574114.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/48853800151.pdfIn PDF document text
    • http://com123.vn/uploads/file/24014848633.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/71642424146.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/72794910399.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/20973877418.pdfIn PDF document text
    • https://elmawadah.com/userfiles/file/tilukoni.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144a1a71fb7f---37947955527.pdfIn PDF document text
    • http://babyshelter.net/assets/upload/files/88227852830.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614b3893dfc85---63075535667.pdfIn PDF document text
    • http://ip-malkov.ru/uploads/files/22053923475.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16141cf2de6b6b---81699999342.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161496b7a5f35b---kolojujifupuziku.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/majazatum.pdfIn PDF document text
    • http://tw-echen.com/uploads/files/202109031218345722.pdfIn PDF document text
    • https://cs168.tw/upfiles/editor/files/13924154374.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161342d553a081---zanatakajawevuxivuwupas.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/e2be196da58b784ef80d581ff4f62c79/golimesupod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=potplayer+android+tvPDF 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_off0000af04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF04 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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