Malicious PDF — malware analysis report

Static analysis result for SHA-256 692fd150b8e5e465…

MALICIOUS

PDF

86.7 KB Created: 2021-07-15 10:35:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: 137d049d6d6c49cb928b1bf172cebaec SHA-1: 9400817c8f7270a781f6d9f1da9079118043825d SHA-256: 692fd150b8e5e46570527a7c7b4a26736a289e65e78661956f11f2b6bdbe3a67
76 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by an ML classifier as malicious. It contains an embedded URI pointing to a Google feedproxy URL, which in turn redirects to a Squarespace hosted PDF. While the direct URLs appear benign, the ML classification and the presence of an embedded URI suggest malicious intent. No scripts were extracted, limiting the analysis of the exact payload or execution method.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8083

Heuristics 4

  • 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/sq/ugae/~3/qQn0o4eTdIQ/square?utm_term=oxford+picture+dictionary+teacher+resource+center PDF link annotation
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee6cea8feeeb055d9d12c9/1626238186522/47563163405.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee3be0f72ce0266e0fad15/1626225632824/how_to_draw_a_celtic_knot_in_a_circle.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edc8f4895aae42f657ef98/1626196212312/ps2_rom_torrent.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7b3e12c1416d2f19eab0/1626110782430/50_most_annoying_songs_ever.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8c2293e172817b39c2ed8/1625866793168/marriage_anniversary_wishes_with_name_and_photo.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_off0000efc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D2 17428 bytes
SHA-256: f133db1541e25a92cf16c42dba6160df076fa3e5852d79918cc7b1368c21dd9d
font_02_sfnt_off000134fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134FD 11012 bytes
SHA-256: 5a23a361ad681cf8ac13b0ad15aa33e6f6c37eb743cecd438aa1171d6189631a