Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d207504439ebecc…

MALICIOUS

PDF

76.9 KB Created: 2021-07-12 21:01:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5e4c557623ca5f6600f32c22b00419a5 SHA-1: 012ff3e147d001e62584ffb93a896799f7bd4539 SHA-256: 7d207504439ebecc63d29adc7b98963f232ffc1dcb86c80236a4d92644a2f74b
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, while currently marked as benign, points to a URL that could be used to host malicious content or redirect to a phishing page. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the presence of external URIs and the malware detection strongly suggest a malicious intent to trick the user into navigating to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6911

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/-7-cX3opz_8/square?utm_term=foundation+of+information+technology+class+9+solutions+chapter+2
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e9097c8ce0e10532d1de45/1625885052816/puripitomutuki.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e85e14c7770375079f6727/1625841172629/changing_non_modifiable_alimony.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8e344e370ac632285ab9c/1625875268688/apple_french_toast_casserole.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec77fb154eb17b6848dbcb/1626109947777/kevozafafexul.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_off0000c629.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC629 16792 bytes
font_01_sfnt_off0000de40.bin
d4c6153fa1ed84f75024950ef324168e1f5db846dda9e614bd7fed9a10298528		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE40 11544 bytes
font_02_sfnt_off0000f94b.bin
8a67ee421c01ffaec80505a744254c229bfff6d5fa8eb79b7698feb6cf31a786		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF94B 16836 bytes

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