Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe704d7981e5ecb…

MALICIOUS

PDF

85.5 KB Created: 2021-04-07 07:33:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ab87d07ac44355cb323e4584c85db89 SHA-1: 6f7b6e2e87b6fa228da4aa33764326a091559d05 SHA-256: 6fe704d7981e5ecb829f834745348dcf2693d1591b7e3aff5fa596e3f07d8884
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, one of which is presented as a photography-related document, suggesting a lure for phishing or malware delivery. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest it may attempt to redirect the user to a malicious site or download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.natsihwa.org.au/sites/default/files/webform/tuwagamutavuvefofufeniz.pdf
    • https://www.pharoxglobal.com/sites/default/files/webform/27804174203.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/nutuzisujobipusife.pdf
    • https://www.woonsocketri.org/system/temporary/webform/bogobovimefegaf.pdf
    • https://www.woonsocketri.org/system/temporary/webform/viwubamonutimujogigifowi.pdf
    • https://extranet.blanchisserie-toulousaine-de-sante.com/sites/extranet.blanchisserie-toulousaine-de-sante.com/files/documents/justificatifs/bariwogutal.pdf
    • http://www.grotekeukens.be/sites/default/files/webform/gmawards2018/jebumimebugamoto.pdf
    • https://ambrose.edu/sites/default/files/webform/xixarujopotagateregigo.pdf
    • https://www.pharoxglobal.com/sites/default/files/webform/zomufajiwadusepa.pdf
    • https://architecturaldesigninc.com/sites/default/files/bujepalifomi.pdf
    • https://ambrose.edu/sites/default/files/webform/rebunedirewe.pdf
    • http://www.grotekeukens.be/sites/default/files/webform/gmawards2018/sakobonomoduriv.pdf
    • https://natsihwa.org.au/sites/default/files/webform/kixeje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=camera+lucida+reflections+on+photography+pdf
    • https://thesanfordschool.asu.edu/sites/default/files/webform/63066688876.pdf
    • https://lib.asu.edu/system/files/webform/53252105934.pdf
    • https://thesanfordschool.asu.edu/sites/default/files/webform/87767597376.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110f3.bin
3863fd24f50ab0747c96c113857b64e4e758863e4f603f0c276cd6f3641d73b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x110F3 5576 bytes
font_01_sfnt_off000123c4.bin
4d8dccd85f604de7955086924109c86fdeccc2144e8bab51744b4c099e239ddf
pdf-font-stream PDF embedded font (sfnt) at offset 0x123C4 10908 bytes