Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1e797b0d0eb1e9…

MALICIOUS

PDF

87.1 KB Created: 2021-07-13 20:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 16e7c4923e86331b658d774b8e77461f SHA-1: f342b6be34f0576094b79c937c2cd916ab54c6d3 SHA-256: aa1e797b0d0eb1e97c17aa8373c478b2eb2e8746f11d4b0898ba879c841edcb0
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as 'Pdf.Phishing.Trojan', indicating malicious intent. The presence of embedded URLs, even those marked as benign, suggests a potential phishing or malware distribution vector. Although no scripts were explicitly extracted, the PDF structure itself can host malicious content, and the 'unknown_exploit_score' suggests potential exploitability.

Machine Learning

  • Nyx PDF Classifier clean score 0.0410

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/~3/0YvHz_IItD0/square?utm_term=lather+%26+smooth+snow+globe+gift+dome
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed7af6f84adf285bf34af5/1626176246588/dp_pics_new_style_girl.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e9411c8915684aa53e4412/1625899292261/many_files_in_one.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c51b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC51B 16792 bytes
font_01_sfnt_off0000dd2d.bin
1a112e8788f454577c4283406833cf88ff1c95811395a660e80df9d254118b6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2D 23048 bytes
font_02_sfnt_off0001161c.bin
8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1161C 16060 bytes
font_03_sfnt_off00012b26.bin
318c5cc871dee92a1688ee8320c6b04974d94ab939e937bf4e2bddd0385baf88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B26 3788 bytes
font_04_sfnt_off00013a2e.bin
cbd2fdce1da98ee250e498c9546b9e5e7dc6cb93d0e82cdc98afb1f25cac22cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A2E 9624 bytes

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