Malicious PDF — malware analysis report

Static analysis result for SHA-256 85442f6fbabe735d…

MALICIOUS

PDF

79.6 KB Created: 2021-07-17 08:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 940c0e5bab26dd1566e55115151ebcca SHA-1: ea7b6436b4a4795c74be3df005900bd633d51775 SHA-256: 85442f6fbabe735d396fd61b3fa61629b6925c9a2501af176ec514a4b6c27e70
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user. The PDF structure and heuristics indicate it's likely a phishing lure or a dropper for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6198

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/pL_UGxDroB4/square?utm_term=git+interview+questions+and+answers+pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee87127d49fb55d62b7415/1626244882233/xusenonigulitog.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60efdcd94980ba6b3b6d3eff/1626332377564/7851507055.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0a0710060c308d8b39714/1626382449677/pexibexagisegijadubiga.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_off0000d8c7.bin
698893fd2ea8269a6758511ee575669e21d024fd092e534dbc2381e1362ef5da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C7 10884 bytes
font_01_sfnt_off0000f1f2.bin
ddd79d4e120c66eea424e78b0d7f937449e02ff03eee5266090608a551aa7922		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F2 15884 bytes
font_02_sfnt_off00011ab1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB1 16792 bytes

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