Malicious PDF — malware analysis report

Static analysis result for SHA-256 4336ed08e9186f17…

MALICIOUS

PDF

78.6 KB Created: 2021-07-21 04:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 282c5fb9fc41ddf343026ae396da9dca SHA-1: d6b55c1570b2f315853c467639d5b81813f6bfd5 SHA-256: 4336ed08e9186f17a38a880836f436fe5d7135526d12d97d4227b0a7fbbb21d4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs and the PDF structure suggest it is likely a phishing or scam document, possibly attempting to exploit vulnerabilities or trick users into downloading further payloads. No scripts were extracted, but the PDF structure itself is suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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://feedproxy.google.com/~r/sq/ugae/~3/EjZ5HCEZs_A/square?utm_term=what+girl+cartoon+character+am+i
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f16738311eab0d81ae89b8/1626433336193/change_page_size_in_acrobat.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e904b437cb9044755ed4ff/1625883828527/80901014077.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edc86fc6126f45c3dfa7ad/1626196079438/chhota_bheem_in_tamil_episodes.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee39c68e3fff2bd3c04b61/1626225094397/physics_class_11_chapter_3_questions_and_answers.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0d4563fb9dd5818d3233c/1626395734549/management_review_inputs_and_outputs.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0b206a57b467a2289834e/1626386950948/leon_andre_talley.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec8b286ad76c0974910517/1626114856456/99059866820.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f69824fec50128e9299f74/1626773540583/82699464671.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8bc9f89f8e700bf848b1/1626115017814/nba_2k18_for_android.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_off0000cf6b.bin
1942c09e37789a456aa5d5827422d9c3d7b75e61274400febd42fff5978893ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6B 10500 bytes
font_01_sfnt_off0000e71d.bin
7724042caf96445d2f516310ff7e7b820a8d85301b138fa0db451da01d7f6c6b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE71D 17888 bytes
font_02_sfnt_off00011675.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11675 16792 bytes