Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0bd3887a8ce0e13…

MALICIOUS

PDF

73.6 KB Created: 2021-07-12 21:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6c8fda9fb75f8736007fbe53dcc5cb05 SHA-1: 7111fb2792f2fb8e6e75cfb06881f790d40eb9e9 SHA-256: f0bd3887a8ce0e132f09ca0efe5cee19b7f4c59f2032e2ab825916fd64bb1d3e
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. The PDF contains embedded URLs that likely lead to malicious content or phishing sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a harmful destination, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8907

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/S-4CHg4Qmwo/square?utm_term=find+factorial+of+a+large+number
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec821b5978cb5ccaaaaef6/1626112539921/should_be_would_be_could_be.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e948e0b630645a0ef881f7/1625901281025/28639551580.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e937071448b06198492b3b/1625896711665/noluzaxikofuvamitekul.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8d3041558191f5f460aa4/1625871108413/toxogagawoximapolizixege.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8cb83d7d143313afee245/1625869188031/99294700701.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7a1854454ab0ddd82c628/1625792901542/the_car_lot_online.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_off0000c1f0.bin
b3411c0b4ce64b14809450649d81ee1926f9bf00c65654518623064ee0de9418		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1F0 15436 bytes
font_01_sfnt_off0000e958.bin
966ae4c23e03c1c3e848576bd5027e8da78ff192b511174694ba8e81d735ed35		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE958 10868 bytes
font_02_sfnt_off00010231.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10231 16792 bytes

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