Malicious PDF — malware analysis report

Static analysis result for SHA-256 c23a8adc0b3b7666…

MALICIOUS

PDF

75.6 KB Created: 2021-07-16 03:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b1bb084feb7545d9b8781bab442336e3 SHA-1: f8e16b50d34b99c57095e8a18549e5f8e1c043b4 SHA-256: c23a8adc0b3b7666aecfee982b1ba5c5ceae067b1d3119dd610301bfcd092e6e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains embedded URLs that likely lead to malicious content or further stages of an attack. The presence of embedded URLs suggests an attempt to direct the user to external resources, a common tactic in phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/razvivatel/yapz/~3/4Ji06Fp1PxY/square?utm_term=to+validate+meaning
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0c04ee013e242e70e1073/1626390606499/23715564548.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e86cdf7b2085302d909661/1625844959089/683837335.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f0bac393f2b3003807c61d/1626389187846/moled.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f01d22b37dc55b03517004/1626348834252/remuxox.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee447c796bb0196c6225fd/1626227836767/rikedazimuve.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ecacc93631fd4ab81a334d/1626123465726/xusezu.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eff5f3365a201d3c38ef86/1626338803471/vygotsky_social_interaction_theory.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8c285f604029b992594a/1626115112621/54399174962.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0083aa26b2b69a35da16b/1626343482409/minecraft_java_how_to_invite_friends.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e94ac12c5c2f6215ca4a3c/1625901761799/mexican_are_native_american.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_off0000c995.bin
df9d7ea9ade05d4fc626963d92c78c554b22317902d6b1b9b65ab7c84f665581
pdf-font-stream PDF embedded font (sfnt) at offset 0xC995 16152 bytes
font_01_sfnt_off0000f348.bin
a4295cc350c2c9dd92d39ce16f33a073979402dc81f48dd5c560f42e1b962e69
pdf-font-stream PDF embedded font (sfnt) at offset 0xF348 10352 bytes
font_02_sfnt_off00010a67.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A67 16792 bytes