Malicious PDF — malware analysis report

Static analysis result for SHA-256 765bf9502334fcb2…

MALICIOUS

PDF

78.4 KB Created: 2021-07-16 02:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 7fa86819af2b913685da5efa88383fef SHA-1: a677fe87e433fa31c295073b9ab87c163b117cd5 SHA-256: 765bf9502334fcb27430cdeb554af4881b93ef3c404843a370b69fa55e82de6f
76 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains heuristics indicating it's a lure for free downloads, redirecting users to an external URL. The ML classifier strongly suggests maliciousness. While no scripts were directly extracted, the redirection mechanism points towards a phishing or malware distribution attempt, commonly associated with spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/razvivatel/yapz/~3/NsX9ihectO0/square?utm_term=developing+intimacy+with+god+pdf PDF link annotation
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee7b1364675e3b9de4ced8/1626241812146/download_lcpdfr_0.95_rc2.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee8019b1f8b95648897e30/1626243097136/66357958413.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec87f7ad4a1a22a3e7dfb6/1626114039251/banking_seating_arrangement_questions.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0a345ed8b8a523b8b666b/1626383173333/34613752872.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee45dc2af4c01978fd6ae7/1626228188991/wudujulu.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e94ea127127e6804173671/1625902754125/finite_element_method_lecture_notes.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60efeee8e00eb31d7cecf984/1626337000818/kejafewiwoduzusasif.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e91d33fc46b1505827f746/1625890099263/largest_cell_in_human_body.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f07704a5088e0591433f21/1626371844418/america_history_of_our_nation_textbook_online.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e94884b68d8f0f4bf980b2/1625901188912/thinkin_bout_you_rod_wave.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec867cc3fb560d26f330de/1626113661101/acnl_dynamic_painting.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f001743a4e3014a1c2ecb5/1626341748208/simplify_root_12.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60efdf0cd7775704165243d3/1626332940577/how_to_check_for_serial_number_on_laptop.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f07149e9e0d35c3b8e6d45/1626370377561/can_you_solder.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_off0000cff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF4 16768 bytes
SHA-256: eec6d7aa3f99cc904d032f166c01e30e81cace9dfee91f5aa0acd96dadaa1e56
font_01_sfnt_off0000fbd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD5 11068 bytes
SHA-256: 7e5797643184c724b15b44178024074d88db94ccc8cb3259f8e2b487d797cc89
font_02_sfnt_off00011542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11542 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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