Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e0324b0bd28dd3…

MALICIOUS

PDF

92.7 KB Created: 2021-07-18 08:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2c02d3c8980669090a36f428b817dd84 SHA-1: 6ccf274bbfeef7295b93726a53528d8514596e48 SHA-256: 18e0324b0bd28dd3ff838d941ab895c738cb7d271a42a9b4ad58f59ccb4d89f1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, even if some are marked as benign, suggests an attempt to redirect the user to potentially harmful content. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malware distribution vector, likely leveraging embedded links to achieve its objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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/um1bUVUAM38/square?utm_term=being+a+lecturer
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e94950c91b61347ea4da3f/1625901392812/mackenzie_ziegler_before_and_after.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec9bf85f8bf9690720115f/1626119160774/free_robux_hack_android.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8e4fb0cbdad4d35030807/1625875707241/42855063209.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec80d2bdd82073f6fec8bf/1626112210335/55246045582.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e93866c4c1a734c5d7a031/1625897062385/27316002326.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e944a858c6623f038374e2/1625900200168/how_to_astral_project_guide.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f397f427519501fc151b4f/1626576884409/call_of_duty_pirate_bay.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8226297884458c9a48dcc/1625825891095/41407580200.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee443e6bb0602df2120c30/1626227775058/48963888648.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_off0001083f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1083F 16792 bytes
font_01_sfnt_off00012056.bin
76dac80d470e1f3dd1c23357322097dbab2bcae383550fbab80c3bdac0439554
pdf-font-stream PDF embedded font (sfnt) at offset 0x12056 10268 bytes
font_02_sfnt_off0001378b.bin
1f705e108ba9d681c68b8637504d1428cd62fa8463a55108a282438a983c0d69
pdf-font-stream PDF embedded font (sfnt) at offset 0x1378B 18404 bytes