Malicious PDF — malware analysis report

Static analysis result for SHA-256 906b96ce0d43c0aa…

MALICIOUS

PDF

75.5 KB Created: 2021-07-13 15:37:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8a0cc6e8279a2a540fa55ea3bc2cced0 SHA-1: 0fddb052018815ea3fdbdb561404b1d3b5d591c4 SHA-256: 906b96ce0d43c0aa9b65373e6766900d0dd556c2956e34db0422052e4938d697
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The PDF contains embedded URLs, some of which point to external resources. While the document body is heavily obfuscated, the presence of these indicators suggests the file is designed to lure users into clicking malicious links or exploiting vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8872

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/qI_NY8u86tA/square?utm_term=export+ms+project+2007+to+pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec9e541cff58014d564c75/1626119764152/unable_to_copy_from.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed79e3c1f2f61945a43c8a/1626175971390/german_words_with_w.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8ecec309bd63f3d8392f1/1625877741002/wejasozib.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8c82f3add050c1b4b5837/1625868335173/burazajipize.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec9013e7718717d762f536/1626116116132/nasukinujaxeluni.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_off0000c646.bin
d379e9daa7f5e4a2b6625f8c103f38e8fd847ec959cede769c2a7576ea68b6fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC646 16408 bytes
font_01_sfnt_off0000f0e7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E7 16792 bytes
font_02_sfnt_off000108fe.bin
c57dfbd513696443b68396cea8fcfef30739212ae1ec1dba8dd6edf5cc606ab3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108FE 10884 bytes

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