Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd4742c2bbacd03…

MALICIOUS

PDF

69.7 KB Created: 2021-04-18 12:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8db3c4dee33b1683f2ff004079d09d25 SHA-1: 969efc623335984b321f50fd7850401e1d634617 SHA-256: 6fd4742c2bbacd030edc2ce070b3f9e16a31b8502c7131cd81d1ebdbabd6294c
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that, while currently benign, is associated with the malicious content. The document body, though heavily obfuscated, appears to be a lure related to a Philips shaver, suggesting a phishing attempt to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://grossenbacher.co.nz/en/system/files/avoidance-training-certificates/13471650610.pdf
    • https://www.a1touchsolution.nl/sites/default/files/73086307569.pdf
    • https://www.ofalloncasting.com/sites/default/files/webform/tasuwagorefovufozibojer.pdf
    • https://www.ofalloncasting.com/sites/default/files/webform/gegemapoxazokex.pdf
    • https://www.jts.org.jo/sites/default/files/webform/1653940235.pdf
    • http://www.friendlycc.com/sites/default/files/webform/zuguxinukebezukul.pdf
    • https://extranet.blanchisserie-toulousaine-de-sante.com/sites/extranet.blanchisserie-toulousaine-de-sante.com/files/documents/justificatifs/6659556688.pdf
    • https://ambrose.edu/sites/default/files/webform/talizovub.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/gurasijam.pdf
    • https://www.jwico.com/sites/default/files/webform/49109440539.pdf
    • http://www.friendlycc.com/sites/default/files/webform/tojatovovezugunubi.pdf
    • https://www.dgs-interparts.be/sites/default/files/41094691834.pdf
    • https://architecturaldesigninc.com/sites/default/files/vudezuluxi.pdf
    • https://ambrose.edu/sites/default/files/webform/rebunedirewe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=philips+9000+shaver+cleaning+fluid
    • 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_off0000d120.bin
a5910afd62cebc5f45bba09d945ae9ee17ccc02dffdda47afe8331e21143dc4a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD120 5776 bytes
font_01_sfnt_off0000e4cc.bin
7a3f129a59da93b403971440bb15d635e9b5a492104569609f2b832970068a34
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CC 10452 bytes