Malicious PDF — malware analysis report

Static analysis result for SHA-256 98000e1feb0ee303…

MALICIOUS

PDF

115.7 KB Created: 2021-07-19 12:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: bb1c95b348c21467bdf4d5cb687d5561 SHA-1: b05062718f03b7e8a5a3188b5c8da7bb150e2175 SHA-256: 98000e1feb0ee303e01366a46fed19da10008a144100a8ba4cbb68fbbef169fd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, though currently classified as benign, suggests a potential mechanism for downloading further malicious content or redirecting the user. The file's structure and detection by ClamAV as 'Pdf.Phishing.Trojan' point towards a phishing or trojan delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6008

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://feedproxy.google.com/~r/razvivatel/yapz/~3/1LSSs5qy-i4/square?utm_term=gas+adsorbed+by+activated+charcoal PDF link annotation
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edd7bb537dfa200403d0fe/1626199995880/96832994619.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60efdd395d627c4551e0fa68/1626332473886/normal_heart_rate_of_8_year_old.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7c751adf2c26882ffabe7/1625802577481/nazomopovolozewolafupafes.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000160b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000178ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178CA 10720 bytes
SHA-256: 1a92b1251a56fa3126d52a2df94e84f3bb080eb16dc808037fc16f2d34a403b6
font_02_sfnt_off00019193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19193 19560 bytes
SHA-256: cd72b153aaaf89dabdd9e6b141174855276a757a06f6c94f0a1267be850b70ed

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