Malicious PDF — malware analysis report

Static analysis result for SHA-256 829fcf48f35c2c2c…

MALICIOUS

PDF

92.9 KB Created: 2021-07-19 03:39:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b92fd99436a9efba5c1fa8cb0d2ff944 SHA-1: 66206c7e33969c332ec30ac04a6eda6d91e005dd SHA-256: 829fcf48f35c2c2c19a653853d191db6e9a6499be0458bbb4a4f1f5bb02c20ec
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URLs that lead to external content, suggesting a phishing or redirection attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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=sermon+on+the+difference+between+grace+and+mercy
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8135a4d2175279d15b1df/1625822042901/camping_with_fire.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f3ea75bb7e64222dfe4d4b/1626598005925/hurts_donuts_in_omaha.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e93f83309bd63f3d8701bb/1625898883611/how_long_does_a_warm_front_last.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed97a6a5c02c6ff4d9ea0a/1626183590808/16117763078.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f4bbd85f13a15bd82f3ee9/1626651608224/can_you_get_arrested_at_the_dmv.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f027fa36870d1a2db91629/1626351610713/kujetivu.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f28b8681f38b20587e4d66/1626508166748/the_core_competence_of_the_corporation_prahalad.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8e7ab0cbdad4d35033e3a/1625876395640/81883385845.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f07b1c5ea0710b9d512aaa/1626372892345/call_of_duty_waw_zombies_mods.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_off0001087b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1087B 16792 bytes
font_01_sfnt_off00012092.bin
088bfe28c3bd568462e9d76eec26813e0d4a8c5ac2b86272f60e8cbf10cec7ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x12092 11124 bytes
font_02_sfnt_off00013a39.bin
a7922fcc21ecc6fda5c38a138e6790f77ea82b2bcafac35a6926474edee235b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A39 17240 bytes