Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1fed55365346544…

MALICIOUS

PDF

77.8 KB Created: 2021-07-16 05:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3398269a19d3b56b2fac879f15945d45 SHA-1: f09058ca9f8e85b7871e9bca98eeaeda1c957355 SHA-256: b1fed553653465440d99dc2b8aae0b0b81ae56a4c4920da2e6354a1cf026dad2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, one of which is a feedproxy URL that could lead to a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7691

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/sq/ugae/~3/iXsW93xxTQA/square?utm_term=quotes+for+walking+alone
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e77cf28a1e29062001ff23/1625783538574/pejakubosegikolon.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed9f07920f291d3920a4aa/1626185480003/best_job_objective_examples.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60eca1eccd1a1204f6cb0323/1626120684702/93642318937.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_off0000cf9e.bin
7ef71c77a8a9214ecd67621c8f3ff446c79065050386c160c35a305465c471e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9E 16236 bytes
font_01_sfnt_off0000f92f.bin
1aff08eca019c6a40b46763dd9977142f596840e654b23356fe6f3f9103bd4e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF92F 10724 bytes
font_02_sfnt_off00011224.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11224 16792 bytes

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