Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df7dfb101df469d…

MALICIOUS

PDF

72.3 KB Created: 2021-07-19 21:25:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a98c616d1b7fc7562a94dac176815894 SHA-1: 65509231352855383cf723dcee310b3ed1582be4 SHA-256: 1df7dfb101df469db6fa35a8fed0de2978b698e4fc2b63b7ac3205226d42e0d1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, though many are marked as benign, suggests an attempt to redirect users to external resources. The file's structure and detection patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8363

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/X6hrLWyzjlw/square?utm_term=division+word+problems+grade+1
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f394dda047b63612280da7/1626576093509/download_autocad_2016_free_trial.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f57054db752c5e49c49480/1626697812783/78847753462.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f060c905f87640ba7e7b22/1626366153176/philadelphia_airport_cell_phone_lot.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f31a8c26c2747482dcc4f1/1626544780630/tralala_my_ding_ding_dong.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f4f7441db272198faaf7d5/1626666820466/automobile_engineering_mcq_book_download.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f44835689a653fd2a07e4f/1626622005246/44330724267.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_off0000b9b6.bin
879c10a250bb1e936a08613c4af0fcc66551e01b101d948fec38b27c7c6b83b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B6 10980 bytes
font_01_sfnt_off0000d2c9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C9 16792 bytes
font_02_sfnt_off0000eadb.bin
9232b1710dbc3e4ddabb8d48b89617895cfee894ac2bb10d5ca0eb3921515b34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEADB 15852 bytes

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