Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb18292f90907bab…

MALICIOUS

PDF

76.2 KB Created: 2021-07-13 09:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a4eb479fb15885573047bf6f09cbc303 SHA-1: f0767beb1976d3d02a1f74118d8dcef6768d88d1 SHA-256: fb18292f90907babdb3e8d4883dadc2c2bf2ede78ad8672fedf37aa6e8b3d3d8
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, one of which is a feedproxy URL that could be used to redirect users to a phishing site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lead the user to a malicious resource, consistent with phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7390

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/aauXj3bnHUA/square?utm_term=i+will+go+to+wherever+you+are
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec81b3ad1bf7105ccbac32/1626112435754/how_to_create_a_crossbow_in_minecraft.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e890d48c671153b5547b3b/1625854165037/online_invitation_card_for_wedding_free.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8ef920a287971af97c8a8/1625878418685/be_the_rose_that_grew_from_concrete.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ecaa165338e9546e4ad0f0/1626122774886/if_jesus_comes_tomorrow_lyrics_and_chords.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_off0000cb77.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB77 16792 bytes
font_01_sfnt_off0000e389.bin
e0d40ef4d3811bfd6454243ef2ccccf57a1a681bafc4e72736a1805231a22fe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE389 16124 bytes
font_02_sfnt_off00010d33.bin
abab76c480b07bf1892a703103295567e162db8d0539cbbf085bf7dedb7bd653		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D33 10432 bytes

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