Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb7ad92d67dfee14…

MALICIOUS

PDF

80.7 KB Created: 2021-07-19 10:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c63568e834e3bf5c1ddda7e72ee78bf4 SHA-1: 3c3507426fef60d733139d1e413128d76ec815d1 SHA-256: fb7ad92d67dfee14a95786975db981ace28eb45f9546afc1d6727c098a59a654
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, suggesting it is used to direct users to external resources, a common tactic in phishing campaigns. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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/CHqDoFjlE84/square?utm_term=fourier+series+and+its+applications
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edb2fac7772f26c8531ac5/1626190586486/one_page_html5_template.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f005aec0b35f4fb3db2a12/1626342830567/jexixirumerudedonixe.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f3fc6fce637c258340a77c/1626602607829/single_phase_full_wave_controlled_rectifier.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e93d5ec91b61347ea488f4/1625898335149/least_stressful_careers_that_pay_well.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f1d8af022a087095ec1980/1626462384097/xegekabemekevajoz.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f3a62b668793736d3565b5/1626580523464/lugono.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee67b486aa876280bf3771/1626236853052/simirabip.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f04ad7cc361861d3d78c03/1626360535848/31744627970.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee2cb3db6052518ec5409f/1626221747672/6601357952.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee2c5e33d4654651bc2c10/1626221662528/your_name_in_english_dub_full_movie.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_off0000d64c.bin
93d9c2ad5cf2794be68d66a0d54b45bad5e5be19c1c9205684655fe8c3a8b10b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD64C 10584 bytes
font_01_sfnt_off0000ee91.bin
7aabeb501d3191bf72d0b86e755e060334be2f955a2389a6a07cca0d819caafa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE91 17644 bytes
font_02_sfnt_off00011cd9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD9 16792 bytes

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