Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea44698c3ed1a809…

MALICIOUS

PDF

76.8 KB Created: 2021-07-19 11:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8575414223ad9eca03730fc2a7da7091 SHA-1: fd5a1d57b93bd9cc5143c38fa6a13df3accc4d69 SHA-256: ea44698c3ed1a80999f6c874b777a446c85f1d19dda875e722981dc5651a0841
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. The embedded URL, disguised as a music download link, likely leads to a malicious site. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to trick users into clicking the link, aligning with spearphishing tactics.

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/~3/5Aj-mlxkUx8/square?utm_term=titanic+song+remix+mp3
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f0656b62e978296c9c1459/1626367339229/ch_words_that_make_the_sh_sound.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f4c04b6c177f33d7b2be79/1626652748069/tilisurijafofalafetefos.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f2a9371db272198f8f8bf8/1626515768021/dell_laptop_operating_manual.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f1eb5801697f42df46d93e/1626467160200/university_of_mary_track_and_field.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ecc591caf21f280d7d43b5/1626129809917/the_home_label.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8e452db8bb141bad637ab/1625875538731/timaduwowuzuk.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f3557dac778402356be992/1626559869549/red_chilli_bar_and_restaurant.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f2dd0280d83038fa7c5e09/1626529026951/46443606510.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f1c4683aa4903ad6e201ce/1626457192655/ravirabijupovutokaba.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_off0000ca13.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA13 16792 bytes
font_01_sfnt_off0000e225.bin
55c695b5511438d788d4be0b8a965eac794034e4f5876a1a994d18bd4c7979e4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE225 16652 bytes
font_02_sfnt_off00010d89.bin
49012fe4b28f6c02278617131c5caa1e9f3befb8a1e0dbe1a6ef354fa5afe6ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D89 10908 bytes