Malicious PDF — malware analysis report

Static analysis result for SHA-256 f56363934af8c306…

MALICIOUS

PDF

81.3 KB Created: 2021-07-15 21:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2607cec0568fdd4a740861923460e35b SHA-1: ea6395d5140d98b00c7cc2881be2cb080d05c403 SHA-256: f56363934af8c3066bcee5bb05aca8d4886a6594be5d3650b14c73779718a2ca
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of embedded URLs, although currently classified as benign, suggests a potential phishing or credential harvesting attempt. The ML classifier also indicated a high probability of maliciousness. No scripts were extracted, but the overall indicators point to a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5793

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/sq/ugae/~3/S-4CHg4Qmwo/square?utm_term=home+remedy+for+toilet+infection
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec918511a746407a427455/1626116485580/public_administration_by_laxmikant_in_english_free_download.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e9265337cb9044756027fc/1625892435889/34337884765.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8ee1d12fb7d0b2790e9f2/1625878045825/6_babies_born_at_once.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee2d5777e2cd4113eed2e5/1626221911332/90566644738.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deb3.bin
3af90749cfc654985cf2719d22bd995006dcb380517df6bc4f6827a7035a65fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB3 10412 bytes
font_01_sfnt_off0000f62c.bin
8324e91678451208ed3f9600d6b4a1d44eb9cd54fef77ad19ca346687b48d380		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF62C 16688 bytes
font_02_sfnt_off00012192.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12192 16792 bytes

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