Malicious PDF — malware analysis report

Static analysis result for SHA-256 af9d802a1dcd6263…

MALICIOUS

PDF

78.8 KB Created: 2021-07-13 13:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eb4a5b526d83ce72cf55765a2abe18c5 SHA-1: 512453b7d34b8c469919bf8c83b1c0d7954ca535 SHA-256: af9d802a1dcd62634b1be60cb95c826d2f80df1c5eb03a269f805b65c4709515
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF with a high ML classifier score and ClamAV detection, indicating malicious intent. It contains an embedded URI pointing to a Google feedproxy URL, which is often used to obscure the true destination. While the specific document body content is unreadable, the presence of the URI and the heuristic firings suggest a phishing or malware delivery attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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/WVKuihPcy9U/square?utm_term=swimming+pool+house+drawing
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e850c1c1820d4d807e2efc/1625837761523/overnourished_and_undernourished.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e9459db9b95949b65fdbf8/1625900445126/vadofikuje.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e81f37e8ef4d41b4fd65ef/1625825079582/tixudimugis.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e91fffe6a58043b69197e8/1625890815331/incubation_period_of_aids.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec801d7726b430b467ed86/1626112029991/black_ops_3_modded_zombies_maps.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60eca64ee7718717d7653f23/1626121806653/munusudogireroz.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e784c496f3e33e8a18db9b/1625785540677/nipofaxewujenef.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8e34bc4c1a734c5d34755/1625875275198/7807469229.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ecd2e66d9796105185d39b/1626133223016/if_your_viral_load_is_undetectable.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_off0000d334.bin
45340d7857ceb22f191e1187d20f33f048ea7b5564034063b187939bbd11332f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD334 11004 bytes
font_01_sfnt_off0000ec52.bin
845af0dbf46a3b99bb749cc3a11e55530db00172cc87cb59f8184b063016d274
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC52 16524 bytes
font_02_sfnt_off000116ef.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x116EF 16792 bytes