Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1f81e146ad23823…

MALICIOUS

PDF

78.1 KB Created: 2021-07-19 07:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f4b95203655bfc4a63efe90ad7ad5faf SHA-1: fc23d63a8d59a0feeb7689dc7638c2f4c3320684 SHA-256: f1f81e146ad23823f0456b2cca974c426de5647bf35e98637493c30b25ce14ce
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded URLs that point to external resources, suggesting a potential phishing or malware distribution scheme. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall detection profile strongly suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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/hIkXU_AiHkM/square?utm_term=mechanical+vibration+by+gk+grover+pdf+free+download
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f302a71d350707421ae192/1626538663931/pharmacy_spread_pricing.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0e4f11d65320800985742/1626399985965/remind_meaning_in_tamil.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f44bc61d35070742280be5/1626622919049/44084366574.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8e260dc37083541b579d4/1625875040626/swot_analysis_of_dell_company.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee6710f72ce0266e126ea8/1626236689000/40788992070.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edca0ee11d817478cfcfb0/1626196495006/gujujokijejezeni.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e92f333f195e1e4036b7de/1625894707268/sefunoxenusimeguxageza.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec947db3b63f0898f36973/1626117245519/28481457072.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0170c0dea5e4896be0c84/1626347276391/anaphylaxis_medical_term.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_off0000caf4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF4 16792 bytes
font_01_sfnt_off0000e30b.bin
48462f1ab585d98783a01f5698596a2e605ff84eab3b60d909c576c83081e546
pdf-font-stream PDF embedded font (sfnt) at offset 0xE30B 11224 bytes
font_02_sfnt_off0000fceb.bin
80ac749bd723fe63de2ea45b42f6a5e4060ee278f140d1945a9dcc9b5adb98ad
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEB 17116 bytes