Malicious PDF — malware analysis report

Static analysis result for SHA-256 311bdfcfaaf5d1dc…

MALICIOUS

PDF

108.7 KB Created: 2021-07-13 16:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 27e0c64a9c0863c465431b3287741c56 SHA-1: c7e84d2e3743a9ab6277734e5582e99226bf68f1 SHA-256: 311bdfcfaaf5d1dc40eac3fa74d678d1e2ed7447c67f8b81fe747725312aa78d
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 phishing attempt. The PDF contains embedded URLs that likely lead to malicious content or phishing sites. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit vulnerabilities or trick users into visiting external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6270

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/RVI1sXQGPkU/square?utm_term=icse+9th+chemistry+solutions
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60eca43c7d354a5e86a60960/1626121276670/weboga.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed45bd2271a75a72d11dc2/1626162621369/10968422468.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec93bc05183b3b579eb730/1626117052661/latest_bollywood_movies_online_streaming.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_off00014a17.bin
202117ffe00d3f7d90212cecd67f7d3b28613c43bdd3ed78429baa449b6f59a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A17 10664 bytes
font_01_sfnt_off00016260.bin
0371005e482db686b6eed58904b1491bd7bb4029fc58689da9e29467361b9886		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16260 17132 bytes
font_02_sfnt_off00018f5b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18F5B 16792 bytes

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