Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebbfc4b25f298c30…

MALICIOUS

PDF

74.3 KB Created: 2021-07-14 00:34:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 488c2625f83fbbe7fa685015041c00ce SHA-1: 5a679038e45b749e6ae9222c5e44ebb8d4ed5d17 SHA-256: ebbfc4b25f298c303a96ca0b7e00d60b50d5689cccd5449a2f46f5acec510a85
96 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, specifically as a phishing trojan. It contains an embedded URI that points to a Google feed URL, which is likely a lure to direct the user to a malicious site. No scripts were extracted, but the presence of the embedded URI and the ML/AV detections strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8802

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/sq/ugae/~3/UZrB20b2Dcg/square?utm_term=how+to+save+snapchat+picture+without+them+knowing
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edfefeebcbe27d0c811fb3/1626210046312/jobs_in_the_medical_field_that_pay_well_with_little_schooling.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edff03bf52576c624a9a01/1626210051940/how_to_download_apk_in_laptop.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e82d096d117d6eeca77f09/1625828617503/bapediru.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8b9d4eebddd6e48ec6fdb/1625864660614/dalutosuradutineta.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edd1af930ff80baa0ab20c/1626198447828/cfs_support_groups.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_off0000c1fa.bin
3652233b02382efdce1e7137b30860204ec0576b5fffb03dbbfa20259672083b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1FA 15576 bytes
font_01_sfnt_off0000e98d.bin
6866e15259fb2e9c4271a323a2b672b5fbd6fa003b8d124195e7a26a9ae94d6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE98D 11112 bytes
font_02_sfnt_off00010355.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10355 16792 bytes

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