Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb47cb0f7289026…

MALICIOUS

PDF

65.3 KB Created: 2021-04-12 09:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 568e2f9fd2b5549528fd835907d03511 SHA-1: 55139c43ecc7591be13279d13a1f65d907e632e1 SHA-256: 0bb47cb0f7289026aefc169048df247de6f78e6003105ff84a50a7399e02d4b5
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are structured as webform submissions, suggesting a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9787

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://www.ofalloncasting.com/sites/default/files/webform/68406293253.pdf
    • http://oaklandchildcare.org/sites/default/files/webform/65810703597.pdf
    • https://www.ofalloncasting.com/sites/default/files/webform/gegemapoxazokex.pdf
    • https://www.mothercare.ro/sites/default/files/webform/resumes/tizagoge.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/dizage.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/fifomibap.pdf
    • http://www.birdlifebotswana.org.bw/sites/default/files/webform/sightings-sketches/13349970620.pdf
    • https://www.visitsavannah.com/sites/default/files/webform/71260674720.pdf
    • https://www.enwidth.com/sites/default/files/webform/resumes/lerudaxalopavowurugepoviw.pdf
    • https://www.mainephilanthropy.org/sites/default/files/kimakevenowafuxopepasu.pdf
    • https://www.mainephilanthropy.org/sites/default/files/30695142459.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=usb2.+0+wlan+driver
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2e0.bin
0bba39fd7d12d6bb245010395cf55d816c5e089df42a3aa4435f19fecb038a91		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E0 4012 bytes
font_01_sfnt_off0000f133.bin
ddbaa0f6d5f0aebcc0f9ea72d3df8d5acf8f031b08d4bf7f59df248253693075		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF133 5408 bytes

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