Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c3db40716b7a933…

MALICIOUS

PDF

77.2 KB Created: 2021-07-14 03:42:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 04c8c1ae845586573e85c1e2a26b9ade SHA-1: 4fc1a3f3c495a87663063dbdfb79eb8d0c59feee SHA-256: 2c3db40716b7a9330c376314e6ee850fa159d6e126c0af474fa0a20f121db1b7
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 or trojan threat. The PDF contains embedded URLs that point to external resources, likely intended to redirect the user to a malicious site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit vulnerabilities or trick the user into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7604

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/rCno-htTzZk/square?utm_term=dirty+filthy+love+2004
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edd9fe9779423221df4dda/1626200574537/8.25_divided_by_3.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7faac217102653d5d19d/1626111914851/gemonubafowam.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e78f5328bb5f4f515ebeec/1625788243307/vaxoduxenuwose.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_off0000cf3b.bin
f96d2531208adc7fbee14349acaafa34eb98dc1dc57b273d74ab3723bcaa2792		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3B 16432 bytes
font_01_sfnt_off0000f9b3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B3 16792 bytes
font_02_sfnt_off000111ca.bin
eccdd0cde49b799deb120c6f23a14fe0288aaf7ea292608a0b17703f489fc204		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111CA 10380 bytes

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