Malicious PDF — malware analysis report

Static analysis result for SHA-256 de30b2c17d816cb6…

MALICIOUS

PDF

84.1 KB Created: 2021-07-18 17:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dd4ef461452456057622c1f4ea885e7b SHA-1: 66af609ed394641153a056da9e3e6949b380b4ed SHA-256: de30b2c17d816cb6ea18ed8c080c7b0ceb5aaeac92726a2556f7924e8b792a51
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of embedded URLs, although many are confirmed benign, suggests an attempt to lure the user to external resources. The ML classifier also indicated a high probability of maliciousness. The file's structure and detection as a trojan point towards a phishing or credential-harvesting attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5793

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/CcIy6vlvkUk/square?utm_term=band+of+brothers+episode+1+online+free
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0591e13097a3c5b8ff5b5/1626364190733/mokateko.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f429a3c2d40e67ec128f7d/1626614180041/45521216231.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60efce5a1b42e761db8666cb/1626328667021/adv_of_frequency_exercise.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f1405e5d599800102fdb6b/1626423390387/71823253708.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_off0000e6c8.bin
33cdf6fff6b049d0b9a18134f77d660fab20611f131c6885ad2da9a63404cde1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C8 10840 bytes
font_01_sfnt_off0000ff90.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF90 16792 bytes
font_02_sfnt_off000117a2.bin
e45494e4ccfcbf2e04c4b662a5f8ce80df2899cb8f413827b306a61fab00fdd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117A2 17212 bytes

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