Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a145a3c4280f5ef…

MALICIOUS

PDF

99.1 KB Created: 2021-07-13 21:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 662b86959ad4cbe8ce818cf59d408960 SHA-1: c3b61d77f9c7ee149b04ba1dcc6597d40ddc86b2 SHA-256: 9a145a3c4280f5efa959a8f587be201dfbd1df8851176874225c98e8f3342ef3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by a ClamAV detection and an ML classifier. It contains an embedded URI pointing to a suspicious domain, 'smidgel.ru', which is likely used for phishing or malware distribution. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, suggesting it's not intended for human readability but rather to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8489

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://smidgel.ru/square?utm_term=all+time+top+scorers+in+football+history
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92bce566ded7d61ad13f0/1625893838359/57572344171.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8195725441e1b37886359/1625823576006/download_artificial_intelligence.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e94ac12c5c2f6215ca4a3c/1625901761799/mexican_are_native_american.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec9f95704a383bbedc256d/1626120085494/normal_urine_osmolality.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edbb399d975b6409e3f30e/1626192698112/vikagagawunuta.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed467737bee829a287a159/1626162807349/allergy_asthma_and_immunology_clinic.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7a97ff9c8b53cea186f3/1626110616025/sly_dog_meaning.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e9448ae370ac63228a0bc2/1625900171076/confused_meaning_in_bengali.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108c7.bin
29fa09d58201502989a3ea1e89a48779e3952548ff967e3c1f17befa8b5427a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108C7 20160 bytes
font_01_sfnt_off00013931.bin
0dc86c75e15608161e069ba638f608e944a33d6e4c68a656f12b45ac588e9cf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13931 10980 bytes
font_02_sfnt_off00015244.bin
9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15244 16092 bytes
font_03_sfnt_off00016789.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16789 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.