Malicious PDF — malware analysis report

Static analysis result for SHA-256 0832916f7cc4d7e4…

MALICIOUS

PDF

78.7 KB Created: 2021-07-18 21:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a5ec2d2722db52cafd1b80962a4412aa SHA-1: c2987f9f697394b0030129d47d2f17602ef04795 SHA-256: 0832916f7cc4d7e4fad8d878a47aa6fb780bd68885111db3926f1f2b7cc74cf1
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan, indicating a malicious intent to deceive users. The presence of embedded URLs, although marked as benign, suggests an attempt to redirect users to malicious sites. No scripts were extracted, but the PDF structure itself may contain exploitable elements.

Machine Learning

  • Nyx PDF Classifier clean score 0.1454

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/~3/9xivtwLAy4k/square?utm_term=exponential+half+life+equation
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7bce25c1b8460033d5c29/1625799906827/46228711002.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee81ee0981f36585a5d809/1626243566553/game_of_thorn.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_off0000d17f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD17F 16792 bytes
font_01_sfnt_off0000e991.bin
1593a5f0cb32062b1b7648dec6511b2872f9666c5f388b6856cda70b3dc4d5ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE991 17304 bytes
font_02_sfnt_off0001174e.bin
53319328dc37c6099c9d82d9e24b6c4107a379900ea79224bd2760a48e05bc93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1174E 10520 bytes

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