Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce668b9c11b380f6…

MALICIOUS

PDF

89.3 KB Created: 2021-07-13 17:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c625aca874f71f01a01ffeba5c9ece16 SHA-1: eddde2a74e7c724931897d77f61ac575037f39b9 SHA-256: ce668b9c11b380f64baf67dda58ea0c813c900140b2655cc68ff57237faa417c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated maliciousness. It contains multiple embedded URLs, some of which are associated with phishing lures. Although no scripts were explicitly extracted, the presence of embedded URLs and the detection verdict suggest it is designed to trick users into visiting malicious sites or downloading further payloads, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6359

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/um1bUVUAM38/square?utm_term=petersen%27s+field+guide+to+cthulhu+monsters+pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec7e66950202184f1004a4/1626111590808/gemuxegaxubokodovuzo.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e949a83f195e1e40378f1d/1625901480725/nofewetupotunewerewevip.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e91cb1defa333328aa5a80/1625889970051/yes_boss_movie_mp3_song_download.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_off0000f673.bin
40d8fc5742e45210a0a56eb73d742fb74573539de0e84d9370e79fdcb379efea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF673 11040 bytes
font_01_sfnt_off00010fc4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC4 16792 bytes
font_02_sfnt_off000127d6.bin
82ada77be61262e06870198def56fcc7011bba741c674b2a0815f78c7302a4d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127D6 18596 bytes

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