Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a6f2669fdd2bcb3…

MALICIOUS

PDF

77.7 KB Created: 2021-07-16 18:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e5d155495bd86065dbc6e5196cba9e35 SHA-1: e9f2d797a4614927797de26cbece172ea614d26a SHA-256: 1a6f2669fdd2bcb34540974b75f9184e9ca087ae80edd62322ce627960669a5b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure suggest it may be used to lure users to malicious sites or download further payloads. The document body was unreadable, preventing a more specific analysis of the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9214

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/razvivatel/yapz/~3/4Ji06Fp1PxY/square?utm_term=mayonnaise+is+made+up+of
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f16a9093f2b3003810e53d/1626434192632/romisi.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec80b1c3fb560d26f29c61/1626112177663/mobdro_not_working.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec868b950202184f10ee16/1626113676094/pebimiwu.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0606e173e047f00a6313d/1626366062333/56489092570.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7e9572e2584f2462be78/1626111637448/9356617456.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec802020781e4bb11b86d3/1626112032634/the_general_unwanted_wife_novel.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60eda936cd0cb17c7630029c/1626188086697/xalamugowajotubijiparos.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_off0000cfe9.bin
8390b3a03c200d9f04c8e6a9a1f4ae11129539f60986589ee8d258dd6d18e8a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE9 16520 bytes
font_01_sfnt_off0000faba.bin
134c12ccb30adeca3a81558e0c329e62e98f0fc6fae77856e72e88c0c5579075		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFABA 10620 bytes
font_02_sfnt_off00011301.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11301 16792 bytes

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