Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4eed6e481f6d624…

MALICIOUS

PDF

86.1 KB Created: 2021-07-20 20:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cd097ec53ccbdc82436013e846bf9352 SHA-1: caaa7f82ef715fcc3acb79ab246378acf1be3efe SHA-256: b4eed6e481f6d624b21785a6c35936a7656f51038acafd9525c8574249245615
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded URLs suggests a phishing or redirection attempt to external sites. While the document body is unreadable, the overall indicators point to a malicious PDF, likely used as a lure in a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9548

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/~3/4aHNpQc2m6I/square?utm_term=bloated+stomach+men
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7a787726b430b4673f20/1626110584689/walufemu.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f1603e46c0d74f87e10d53/1626431550968/a3_woke_up_this_morning.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7b3658f757b1ac44f6317/1625797477722/80265077220.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e923ee2f3c4128e18a587b/1625891822968/34305724049.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f517760dbab00e46f7e723/1626675062460/tonsillectomy_sore_throat.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60eff8c2ec49181e3c110988/1626339522150/vazuv.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8c1701b56fd05757a43a8/1625866609046/xikusejanaxuxewimoniso.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f4676b731d8c7c6f0820cc/1626629996038/gilded_age_economic_issues.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_off0000eea8.bin
b1b845b763dc886c316bb7bbd242d5c016f3fa35f0f0fcf0cb68ec01a8c1fb20		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA8 10496 bytes
font_01_sfnt_off00010663.bin
e71685a17e6da2af342a8aeb74bd05a0849790ef0ca49ce5133a77abd965843c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10663 17128 bytes
font_02_sfnt_off00013329.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13329 16792 bytes

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