Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9464bceece2474b…

MALICIOUS

PDF

73.3 KB Created: 2021-04-15 00:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce1ae6bf7d4096117e5571d048b17b66 SHA-1: e94dc465c2629c6b9d4809f9687aeff7b21d72a3 SHA-256: b9464bceece2474b42b2fbef61adc3d4d163ea8d14016056b07e722e73e6e347
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's used to redirect users to potentially malicious sites, aligning with phishing or malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8143

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://extranet.blanchisserie-toulousaine-de-sante.com/sites/extranet.blanchisserie-toulousaine-de-sante.com/files/documents/justificatifs/goxara.pdf
    • https://www.ofalloncasting.com/sites/default/files/webform/zuloliresu.pdf
    • https://www.blplegal.com/sites/default/files/webform/80507347088.pdf
    • https://www.a1touchsolution.nl/sites/default/files/dovav.pdf
    • http://klm3fg.grhosting.cz/sites/default/files/webform/files/tekuxegejarikuferibo.pdf
    • https://ambrose.edu/sites/default/files/webform/49323480199.pdf
    • https://grossenbacher.co.nz/en/system/files/avoidance-training-certificates/tojawi.pdf
    • https://www.uts.cw/sites/default/files/webform/nukuromenalifaru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=theoretical+and+conceptual+framework+examples
    • https://www.vub.be/sites/vub/files/webform/43319512550.pdf
    • https://www.healthdata.org/sites/default/files/resumes/68382108709.pdf
    • https://drones.princeton.edu/system/files/webform/xakunowegetudirojevogejiw.pdf
    • https://www.healthdata.org/sites/default/files/resumes/53082175038.pdf
    • https://umatter.princeton.edu/system/files/webform/requests/72435273025.pdf
    • https://ec.europa.eu/eip/agriculture/sites/default/files/webform/zuwamusijugowop.pdf
    • https://lib.asu.edu/system/files/webform/90369837207.pdf
    • https://ubmemeaensoprod.s3.amazonaws.com/ifsec_international/call_for_papers/2021/03/kizoromafogikigogusebef.pdf
    • https://ubmemeaensoprod.s3.amazonaws.com/ifsec_international/call_for_papers/2021/03/37488496184.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f124.bin
31dbceda16583f582d2dea617dee98fa7b9ebae9c73245bc7f455dba2ebcda50
pdf-font-stream PDF embedded font (sfnt) at offset 0xF124 5568 bytes
font_01_sfnt_off000103fd.bin
e0e524fa6edc8698664e58c1ed0e182b50f9c1c98f09a82f9c7741cdd7c19f58
pdf-font-stream PDF embedded font (sfnt) at offset 0x103FD 11488 bytes