Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee294a5b30fa5ef8…

MALICIOUS

PDF

70.3 KB Created: 2021-09-12 04:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 4f9fa93a96b3dc217950906f6dea2f53 SHA-1: 1609bdf94bb763118ae27f5c7143524f53a36dcd SHA-256: ee294a5b30fa5ef84cfe453f5a94cd218a03355f30d8b09c031209882b5232cc
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated maliciousness. Heuristics identified it as a link farm with numerous external URIs pointing to potentially disposable domains, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5683

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://mallncart.com/userfiles/files/63632384002.pdf In PDF document text
    • https://loyd.rs/images/file/55529019350.pdfIn PDF document text
    • https://conrays.ru/f/data/dejububopekukor.pdfIn PDF document text
    • https://www.nvsrolko.org/ckfinder/userfiles/files/zapol.pdfIn PDF document text
    • http://ysmenmidwestindia.org/uploads/userfiles/file/file/51044915968.pdfIn PDF document text
    • http://cleanking.net/userData/board/file/tijopez.pdfIn PDF document text
    • http://majstrissmt.eu/www-data/file/96137313513.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/feluxopatasofij.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/09/files/210906000721.pdfIn PDF document text
    • https://jjpremiers.com/files/gulibatikizu.pdfIn PDF document text
    • https://csam-villepinte.org/uploads/images/file/nazug.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/52690065656.pdfIn PDF document text
    • http://rjt1.org/upload/files/63082569511.pdfIn PDF document text
    • https://priscar.com/documents/files/80932831989.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16131708e6b6e7---93700301392.pdfIn PDF document text
    • http://sbcnepal.com/images/file/tenize.pdfIn PDF document text
    • https://asmitahrgroup.com/ckfinder/userfiles/files/wutigow.pdfIn PDF document text
    • http://www.77ice.com/upload/files/wejedenuxitikigavisez.pdfIn PDF document text
    • http://mdfgiare.com/upload/files/83881989744.pdfIn PDF document text
    • http://theclelandgroup.com/img/upload/file/femekenimumukosuvotovepo.pdfIn PDF document text
    • https://pecintajp.com/contents/files/nanerinegarumusugew.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec730f1fb1---metaxe.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/kufedajikinedoselonojanug.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/60041540007.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=words+that+begin+with+long+uPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA72 10848 bytes
SHA-256: a51fbcfdf45bc03e64fa509c75472c45b66b3c6dd0322cebca74daff94a2cac4
font_01_sfnt_off0000d340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD340 16100 bytes
SHA-256: 6744a6587b5f5fc90d4bf5317d6547b2b7036c8ef4c353494de856be9e075dd8
font_02_sfnt_off0000fc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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