Malicious PDF — malware analysis report

Static analysis result for SHA-256 251316531c8dc842…

MALICIOUS

PDF

77.3 KB Created: 2021-07-18 11:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d0a1a5fc5f1866818b0f86cff4dcafc SHA-1: d2384ee283092324053f6cd41c83a8cc653360e7 SHA-256: 251316531c8dc8427d6497d1f40dd9b528185456aace9a5617de7f707912262f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, one of which is presented as a link to download music but likely leads to a malicious resource. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into visiting a compromised site, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9125

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/eoPDrVzwpx0/square?utm_term=my+heart+will+go+on+mp3+download
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e88302cdde05541e20adcd/1625850626480/kakafulawubolivojagapawax.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f0762878351f77a0767fb3/1626371624646/zenedas.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f3d8cb783e880aac85752e/1626593483308/kindle_fire_viewer.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f1d86903f466657cbc8d5c/1626462313799/state_eulers_theorem_for_homogeneous_function.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec9c9de0ada229be592316/1626119325719/rm_and_v.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_off0000ca6f.bin
d927fb58a46c7ebc6d427d0affcb376ab1ada9dfab4e7452290db5f8b7f7fe7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6F 17388 bytes
font_01_sfnt_off0000f7f9.bin
7a370f1c863a208d4cb2ec88a227539301b83ba46adb0846d1dc3dc418013c19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F9 11036 bytes
font_02_sfnt_off0001114a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1114A 16792 bytes

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