Malicious PDF — malware analysis report

Static analysis result for SHA-256 77973a4709e35285…

MALICIOUS

PDF

62.5 KB Created: 2021-04-11 09:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2b6010199cbaebb729d886b488b6958 SHA-1: c0f6f2af66e12a9b3d126ce32f5710072be1d65c SHA-256: 77973a4709e35285ba27718767060dcb05b7cd10cc00c6cee35e52cd598d5134
64 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains or are structured as link farms, indicating a malicious intent to redirect users. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the presence of many external URIs suggests the document is designed to lead users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8474

Heuristics 3

  • 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.a1touchsolution.nl/sites/default/files/87400145234.pdf
    • https://ambrose.edu/sites/default/files/webform/65047245793.pdf
    • https://www.jts.org.jo/sites/default/files/webform/nisegat.pdf
    • https://www.woonsocketri.org/system/temporary/webform/51053607868.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/dekif.pdf
    • http://www.grotekeukens.be/sites/default/files/webform/gmawards2018/sakobonomoduriv.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/tajiwugebewozebukak.pdf
    • https://www.dgs-interparts.be/sites/default/files/60165950635.pdf
    • https://www.ofalloncasting.com/sites/default/files/webform/taxebuvokorutupimapo.pdf
    • https://www.mothercare.ro/sites/default/files/webform/resumes/sojivezogi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=hisense+anyview+cast+android
    • https://lib.asu.edu/system/files/webform/90369837207.pdf
    • https://drones.princeton.edu/system/files/webform/dovekilubexuvizufak.pdf
    • https://www.ice.cam.ac.uk/sites/www.ice.cam.ac.uk/files/webform/wosevojowavinojefe.pdf
    • https://drones.princeton.edu/system/files/webform/61493424170.pdf
    • https://ubmemeaensoprod.s3.amazonaws.com/ifsec_international/call_for_papers/2021/03/woragirewun.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d086.bin
833de16cc1f442970bf6cd0ac04b8a0a07bb154b7e7ea5f0baa97740b939c0f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD086 5116 bytes

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