Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0544567d0b8391a…

MALICIOUS

PDF

78.2 KB Created: 2021-07-12 23:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 55431892c641edadea58d6849f0e10ee SHA-1: 335a3d7754ca43a3092e4b0e6d5d11c079530eeb SHA-256: c0544567d0b8391a6dd55a56f08d181f210ae2da8b3a630b7e41e5515312fe4b
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a visual download button and embedded URLs suggests a phishing or malware distribution lure. The document body is heavily obfuscated, preventing a detailed analysis of its specific content, but the overall indicators point to a malicious PDF designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8439

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/rCno-htTzZk/square?utm_term=fnaf+sister+location+download+free+pc
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8df43b68d8f0f4bf4925e/1625874244072/xujesefiga.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e93c5992abcc18c4f7033a/1625898073192/all_the_barns_in_forza_horizon_4.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e9528af229ba2ea838753e/1625903754650/17330565425.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8cfbac4ce500af8448145/1625870266359/92118694277.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7aa0ace8457037edff2c7/1625795082196/other_words_to_say_beautiful.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_off0000ce1e.bin
1ba08ec7f8d7bd20422c0e8d99d23add3c5004e1bb62ba327204e97b80d89980		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1E 10676 bytes
font_01_sfnt_off0000e6c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C5 16792 bytes
font_02_sfnt_off0000fed7.bin
2fe23489f40bb855b0d5a827d4219fc17f83e07a93b640874d849731e00d0ba6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFED7 17764 bytes

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