Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a5348902994ca34…

MALICIOUS

PDF

78.0 KB Created: 2021-07-17 15:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b87c4bf77d139b1fb7517eec81c68a4c SHA-1: 800db45513aa81ba5d7ee08310b172dff4e8e675 SHA-256: 3a5348902994ca3499535644f31b008a1f5addecc40ed7e140c111ec2f3ea2d7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded URLs that likely serve as lures for phishing or to download further malicious content. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8287

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/ZFaGRQ6RLlg/square?utm_term=day+since+27+april+2007
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7d15e872c4c6263c47470/1625805150449/centripetal_acceleration_and_angular_velocity.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f1b024d125a6489b4afa94/1626452004692/45942109036.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f0a402466a4513387683b6/1626383363222/i_wish_i_could_meaning_in_tamil.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee3320e03b615e098d826b/1626223392383/sokudo.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e945e7f4fe78435a3bdfe9/1625900520055/berks_county_pa_property_tax_records_search.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e82860d93aeb546a17abbd/1625827425105/two_teeth_fused_together.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_off0000cf29.bin
1c1bc1dbedcaab014df438c75a0938a9f6a3b600de480a45f438b4054bcbf2f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF29 10556 bytes
font_01_sfnt_off0000e778.bin
9faed832ae7cf9034c536caff1f6a26cef8bbc483586e2313a95c6212fe6bbf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE778 17140 bytes
font_02_sfnt_off00011458.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11458 16792 bytes

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