Malicious PDF — malware analysis report

Static analysis result for SHA-256 879419d66289147f…

MALICIOUS

PDF

73.8 KB Created: 2021-07-18 16:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: be86e413b6866af759ad5da229309946 SHA-1: 6904d2f1f1843b8e71a177959bd7b2a2fc140dd9 SHA-256: 879419d66289147f70832e8e52f6470ae61bb9ab4dc1e9fd9d8fdeeae8d34ece
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, one of which points to a resource that could be used to deliver a malicious payload. The presence of embedded URLs and the ML classification suggest this PDF is likely a phishing lure or a dropper for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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/~3/4Ji06Fp1PxY/square?utm_term=stewart+calculus+textbook+answers
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f079424bddb81875f1fc68/1626372418863/vememebuxizojusobijaxemo.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee5466eed6cd77ab635a6d/1626231910564/fairy_tail_episode_guide.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e95eb0566ded7d61ae6a4b/1625906864675/about_test_match.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8facbb9b95949b65d05f7/1625881291736/36490854712.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edd5bca50f6e33a323456f/1626199484269/localized_scleroderma_treatment.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec93330f7d8d50062d09d0/1626116915612/sexy_pokemon_gym_leaders.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e952c819a9f87deb746668/1625903816620/pulp_and_paper_chemistry.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_off0000bcaf.bin
7cc0b647b62a306a3d29a6c36d44f540cff415d3162a1a57d9aefaef9f575d4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCAF 10724 bytes
font_01_sfnt_off0000d58a.bin
d8b6b82822a0d50082ea213f37944090f1c79ee59a38811454a44023d823dd27		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD58A 16860 bytes
font_02_sfnt_off0001017b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1017B 16792 bytes

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