Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc525741d7b3ffe5…

MALICIOUS

PDF

77.2 KB Created: 2021-07-14 04:33:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f7cb47c6e2a00d41d61248c6afb0d579 SHA-1: 54c8c04c01d6418fe053fdd372581434a78acca9 SHA-256: cc525741d7b3ffe58c84d8c659e8e60861ca3c9ed0eaa16beba2c2d44de3ad10
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 PDF_URI heuristic identified an external URL, suggesting the document is designed to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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/iCUEKX862tE/square?utm_term=hey+there+delilah+uke+chords
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e80a7b28bb5f4f516551e7/1625819771164/the_breaker_new_waves_scan.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e901f6b9b95949b65d62b9/1625883126166/28772970663.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e827d251cb2a526cff95f2/1625827282482/thelegend27_revamp_by_5vf.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edace3cd0cb17c7630655b/1626189027775/diary_of_a_farting_minecraft_creeper.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e768550d39ed3b58736ddd/1625778261185/offset_father_of_4_album_zip.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e90756e6bd1231e606ec25/1625884502809/madison_federalist_paper_10.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e77187a7e859000d1e5314/1625780615636/42199204480.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e77d7368910946625e70f3/1625783667572/bamupodijovuboxuxopidoto.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7965adbb92d34f5aac431/1625790043012/tujasabovo.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_off0000cbf1.bin
b1dd4bdf868fb2e909b43768af2facd0c9480a3886bc179a916be655da7aafad
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF1 10660 bytes
font_01_sfnt_off0000e47a.bin
35e7b8446884b27b59a9d71587a6ec22a98cb467e999e8f3b459ae86b9c6ec44
pdf-font-stream PDF embedded font (sfnt) at offset 0xE47A 16804 bytes
font_02_sfnt_off0001107c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1107C 16792 bytes