Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c5eed36c86a745d…

MALICIOUS

PDF

89.0 KB Created: 2021-07-16 13:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8052b2bb636e9444183b690a1124247c SHA-1: 7ed268726df7f21be264328bf57dc3d21122d41e SHA-256: 7c5eed36c86a745d1f03dd840c05718fe08c1b93132cbcb3cef4121c587aee93
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and ClamAV as malicious, with heuristics indicating it is a callback phishing or tech-support scam lure. While no scripts were extracted, the presence of embedded URLs suggests a potential for further malicious activity or redirection. The document's structure and heuristic firings strongly indicate an attempt to deceive the user into contacting the attacker.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/J-SxIuB37Ms/square?utm_term=investment+science+2nd+edition+solution+manual
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7854d2a59c44508a957c5/1625785677969/ben_stiller_theres_something_about_mary.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e81bdf51cb2a526cff1c34/1625824223189/24216603656.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8acd151359a2b5cfc0da7/1625861330078/40858242794.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7863c7ef31d0d76ee1027/1625785916220/multiple_choice_questions_in_hrm_with_answers.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ecfd9aff6d86145b9aee71/1626144154869/54867959351.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec9d58def1ca41d5fb962e/1626119512974/judicial_interview_questions_and_answers.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edf6c37ce58f02ed9660b3/1626207939955/pascals_triangle_up_to_20.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee4c7d39b82603386b21a2/1626229885200/17786508450.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f14e88da20a917db513a85/1626427016872/st_therese_the_little_flower_novena.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f163be2606b657d35982ea/1626432446986/bobodevuruzuzabijibelodi.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f10689008c226a9423e4a0/1626408586133/besanexivew.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f0e401e9ec2a4c2bd646c6/1626399745403/91302825728.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edb253151a035e9e7ddb96/1626190420134/25002727162.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8d271123eaa19f8fcd7e3/1625870961147/antidepressant_drugs_examples.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_off0000f678.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF678 16792 bytes
font_01_sfnt_off00010e8a.bin
3a2342290964c500901d7f674ec193c8d723d274ce694b4bdb027bf85d77b763		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8A 18068 bytes
font_02_sfnt_off00013e9a.bin
d5b7a1fb6d6d160830aa5eae464f2550db4dad12de52e2dbc55b1117ddc89ebf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E9A 10668 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.