Malicious PDF — malware analysis report

Static analysis result for SHA-256 22074abc3f0a72b6…

MALICIOUS

PDF

137.8 KB Created: 2021-04-07 13:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 098b536e2993f8e0b78e2a4dca8576ee SHA-1: 5b306e5e859043be9a96e80a434cb776a9ca342e SHA-256: 22074abc3f0a72b672912e3f36142a06bfb026a02c78626180655ed2b086727d
104 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The 'SE_URGENCY_LURE' heuristic suggests a phishing or social engineering tactic. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a potential phishing attempt or a download lure, aligning with the 'Spearphishing Attachment' technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/17423244846.pdf
    • http://www.grotekeukens.be/sites/default/files/webform/gmawards2018/87706268510.pdf
    • https://www.uts.cw/sites/default/files/webform/tizodakemepegipupimegoxi.pdf
    • https://ambrose.edu/sites/default/files/webform/71027525942.pdf
    • http://www.grotekeukens.be/sites/default/files/webform/gmawards2018/84972388600.pdf
    • https://www.blplegal.com/sites/default/files/webform/8025899801.pdf
    • https://www.jwico.com/sites/default/files/webform/47965191786.pdf
    • http://www.pbttphtk.gov.my/sites/default/files/webform/238550972.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=spinal+cord+injury+pdf+2013
    • https://printandmail.princeton.edu/system/files/webform/21250884575.pdf
    • https://lib.asu.edu/system/files/webform/sikukuditizituxabisezopel.pdf
    • https://campusrec.princeton.edu/system/files/webform/xapedejezorim.pdf
    • https://lib.asu.edu/system/files/webform/85824103047.pdf
    • https://printandmail.princeton.edu/system/files/webform/68272747422.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_off0001de36.bin
8519f5b4e8b32a86bef5139c84796347454f5d7913317342a2b78c07c35e9027		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE36 5740 bytes
font_01_sfnt_off0001f1ec.bin
2b2124c6e291941e72f7d9efe99deb6c31c87bcf8a33b82c1b4c4e7dc0dd910f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F1EC 12048 bytes

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