Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d30548f074ad60…

MALICIOUS

PDF

85.9 KB Created: 2021-07-12 21:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 60bf7507713d92c9c92e527d485ea7e8 SHA-1: ed9d390f92bb396ad5aed2091ec99384e3a45dc7 SHA-256: b3d30548f074ad609e6145ea549e7c5d1accc0acfb451de86e2c891a25d4ddc6
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including ML and ClamAV, as malicious and phishing-related. The PDF_SEO_UTM_REDIRECTOR_LINK heuristic indicates the presence of an image lure leading to an SEO redirector, which is a common tactic for phishing. The embedded URL, while marked as confirmed benign in the provided evidence, is part of the overall phishing lure. The ML_NYX_PDF_MALICIOUS score of 0.991959 strongly suggests malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/razvivatel/yapz/~3/7R6buoffwiA/square?utm_term=obs+on+chromebook PDF link annotation
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec7f9082b4c978cf412f4a/1626111888873/how_do_you_start_a_fire_with_flint.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e815ef6d117d6eeca68bdf/1625822703179/53650629657.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e889d7455dce08fe7df21a/1625852375821/74260084775.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e9440bc14ff043cd5dfea1/1625900043858/getting_started_in_currency_trading.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8e91c37cb9044755d2552/1625876764512/80959971839.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec85bfad4a1a22a3e7967a/1626113471857/27987164811.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7ad254a52c186ce4090e/1626110674390/definition_of_preposition_conjunction_interjection.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec78affd54eb070824abf0/1626110127975/the_croods_new_age_full_movie_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e9491ef107ff2467ea2ec0/1625901342903/mixagak.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4F 10352 bytes
SHA-256: 1bc3aeb6baae6230eaea96cafcb70048fd29ec0dfc9bb4139def104029990b20
font_01_sfnt_off0001067a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067A 17108 bytes
SHA-256: 7e0912b5e9505c60371a5081108b7c8f69845dbfb98eb7ca1fbb0704b0abb40d
font_02_sfnt_off00013377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13377 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.