Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c2edbadac541b7…

MALICIOUS

PDF

77.0 KB Created: 2021-07-12 22:18:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 93a151b3f5590e61de3a24256526daf8 SHA-1: 7ab993537e0f67f3ca6694fa761d340796b13a3b SHA-256: c2c2edbadac541b7c00468185aee0a8d00013dda2479755b99dd53ae7fa100cf
104 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 document body contains garbled text, but heuristic analysis identified an embedded URL and an urgency lure, suggesting the file is designed to trick the user into taking immediate action. No scripts were extracted, but the presence of embedded URLs and the phishing lure point towards a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7604

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/pL_UGxDroB4/square?utm_term=india+trivia+quiz+questions+and+answers
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec80ec12c1416d2f1a926d/1626112236601/kitolokidigesotiburoxi.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e88c7d18d2642310524850/1625853053397/zanalizifi.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e87786ca5e7e366032bd02/1625847686296/24052997544.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_off0000ca04.bin
491f3fdd8cadb17e188295326bf9291277992d9c1d4ec0055bdbb38ed4731381		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA04 17524 bytes
font_01_sfnt_off0000f7e4.bin
a10a2ef6c00c6ae2c012a8d7f565da8e5c491d4617e91725ae506d8cfd4406b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E4 10604 bytes
font_02_sfnt_off00011023.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11023 16792 bytes

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