Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa720181594ebf9c…

MALICIOUS

PDF

75.6 KB Created: 2021-07-13 02:38:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cb77675cd9b184297acce99dc65b7da0 SHA-1: 5da7f1719010a5714a55053f15bb424214e632e3 SHA-256: fa720181594ebf9c590c2024376e5497218c2a3ccfbbe5dd3220f97f99fb6aa3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, although many are marked as benign, suggests an attempt to redirect the user to potentially harmful content or to download further stages of an attack. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall heuristics point towards a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7703

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/razvivatel/yapz/~3/0YvHz_IItD0/square?utm_term=questionnaire+related+to+fmcg+products
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e77e71db9d02483c7d865f/1625783921835/todojovojejobinenan.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec7104ad4a1a22a3e58f15/1626108164969/to_be_possessive_adjectives.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8ccebc6eee4b058eca67/1626115279190/5101145105.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_off0000c940.bin
eafd59abccb80568fd37a7fc1c1ac4f50be2bbc0c71323921260c5bc1724dd6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC940 15544 bytes
font_01_sfnt_off0000f101.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF101 16792 bytes
font_02_sfnt_off00010918.bin
ec5cec57eb22f2f3c9f4f005e0f62b25bf9e7cdd42f6120c6cd28b23003b4a88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10918 11120 bytes

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