Malicious PDF — malware analysis report

Static analysis result for SHA-256 62fed1a942778945…

MALICIOUS

PDF

109.2 KB Created: 2021-07-15 15:33:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b0abb24bfa4d9cf385f74660fa4eab99 SHA-1: 1b9e51b42c2730419874bc39a80abf631f708e54 SHA-256: 62fed1a942778945ac08694f05ca0064ed9f420db74a24c16cfb427a13ea8931
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded URLs suggests an attempt to redirect the user to external, potentially malicious, sites. While no scripts were directly extracted, the PDF structure and heuristic firings point towards a phishing or malware delivery mechanism, likely involving embedded JavaScript to facilitate malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7738

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/razvivatel/yapz/~3/4Ji06Fp1PxY/square?utm_term=miss+out+on+someone
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e849c98c62796cdc6b523b/1625835977411/effects_of_environmental_pollution.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f00c5808697753172fa82a/1626344536040/76576836186.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8edf8cc7c086459248905/1625878008160/1413473137.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7695926d1b15707cec782/1625778521396/12785465668.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7a5d950202184f0f88e6/1626110557953/73644251760.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_off0001493e.bin
4338d297927c5db102f2fbcda962d797c5dc9e67ab834235251b9b688e7ffd45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1493E 18600 bytes
font_01_sfnt_off00017971.bin
e28b59219d83b22fa03ba23d973521b9ab1cd8816580cd1b39dee95aae040511		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17971 10052 bytes
font_02_sfnt_off00018fd7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18FD7 16792 bytes

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