Malicious PDF — malware analysis report

Static analysis result for SHA-256 9185977834cc2a9b…

MALICIOUS

PDF

79.9 KB Created: 2021-07-18 05:36:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6a30d2c9e8af3ac7099d48af6454de9c SHA-1: 8d53185ea07a49797895583540328cbea6605ec2 SHA-256: 9185977834cc2a9bc7192dd2c07afe2c26c0e3fc79d68e511a246c30646cb99c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. The embedded URL, although labeled as benign in the provided context, is a common indicator for phishing lures. The PDF structure itself contains duplicate objects, which can sometimes be used to evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8298

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/CHqDoFjlE84/square?utm_term=full+erotic+hollywood+movies
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee82d58feeeb055d9dfedb/1626243797259/11551214078.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7df3ece8457037ee2d57b/1625808702691/lcm_of_8_10_15.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f124d3e75c7a046d9c860b/1626416339118/nufabudafetaraku.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee42e0db6052518ec6e148/1626227424735/61007275002.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee4d4bbb85ab7f02bdfa42/1626230091934/tuvepumavetapa.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_off0000d813.bin
cfa0d874c54c22089abdbd22ecbbb86531be359867732c941cd0e0c13ce82df9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD813 10712 bytes
font_01_sfnt_off0000f0c7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C7 16792 bytes
font_02_sfnt_off000108d9.bin
61c44499118ecf32a5a4a2b47285dfe7e3d4d2510cf7d6cc19242eaf0094e4b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108D9 16624 bytes

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