Malicious PDF — malware analysis report

Static analysis result for SHA-256 5378852340d47094…

MALICIOUS

PDF

77.9 KB Created: 2021-07-14 02:13:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5c5769bc717f4d75cd72693213bdc468 SHA-1: 061d9bd4af93dd447f53a35a78969330a56787ff SHA-256: 5378852340d47094e5ed558930df704adfed35a033dae5cbf79bddec51cfa6f0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. No scripts were extracted, but the presence of the external URI suggests an attempt to lead the user to a compromised resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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://cructi.ru/square?utm_term=osmolarity+of+water
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e807cc687a3d659a4dd6dc/1625819084531/pdf_introduction_to_information_technology.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee1c1ba005482cc153b06b/1626217499364/sataniwunilobukijipuxapo.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ecda60c2ef2d11c8ced1c7/1626135136437/dibekazi.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edb716f90efc25ed76f4aa/1626191638413/pizibawuwenepego.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee0fcefd66ff3739ead99a/1626214350374/7049342342.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e90fc0309bd63f3d856f5d/1625886656378/58680709531.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e82f779ebc0053f319faea/1625829239729/phora_with_love_album_mp3_download.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_off0000ce02.bin
4069aba533171177bc963a19c9f386788cf76e97eb2610d7c149747697187c50		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE02 10496 bytes
font_01_sfnt_off0000e5fa.bin
dc8c62b92458d34e5b359c0d37186f1f56fe8bf5995d1af1360a3fcf0ec8887c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FA 16964 bytes
font_02_sfnt_off00011271.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11271 16792 bytes

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