Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade530c3afc4d800…

MALICIOUS

PDF

105.5 KB Created: 2021-07-22 01:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: 921d2930511b931b089869e689db399c SHA-1: 93fe53b2b0f2bc980e485131ff8660bae80c87f8 SHA-256: ade530c3afc4d800df21c40a243157a973f8110b22f810bced5c4a9656b5deb8
76 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier strongly indicated maliciousness, and a PDF URI heuristic fired pointing to an external URL. While the document body is heavily obfuscated and unreadable, the presence of embedded URLs suggests an attempt to redirect the user to external content. The primary URL identified is likely part of a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/IdU8rIDf9lQ/square?utm_term=combination+circuits+problems+and+answers PDF link annotation
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f4fbb7689a653fd2ab52fd/1626667959974/vifariz.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee33a0f6c772366d2d66c4/1626223520340/89249322768.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f061bc13097a3c5b90ca23/1626366396685/human_impact_on_the_environment_webquest_answer_key.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed9b450999c45203720c07/1626184517788/78662777306.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f84cc447dddc167ffbb9b6/1626885316304/list_of_construction_activities_for_building_a_house.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed734a8c96c6301f94d172/1626174282417/9558401310.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f6903649ed543a17dcf7c2/1626771510600/33008745977.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e957cf3f195e1e4037f94b/1625905103626/sonic_mania_android_apk_download_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f088c2f36f125b1dbada15/1626376386203/top_powerful_country_in_the_world_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7cc34a431ed42d2fb3d0d/1625803828631/butesanixenufirakufiluvo.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f6a15bcbdc04187b47b154/1626775900397/kibexenivifox.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e92dfdaa30721e65efa3a9/1625894397227/hoopa_and_the_clash_of_ages_full_movie.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f55b43731d8c7c6f153cf2/1626692419637/first_angle_and_third_angle_projection_difference.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e85e54344da47feb0c5619/1625841236678/gamorad.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f68ca5bace2302b51cac85/1626770597678/classification_of_relays.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60efe0ecc00d13116b42fdf5/1626333420620/darumudijisizifofimafizi.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed9beccd5f69124b410515/1626184684358/symmetric_equation_of_a_line_in_3d.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_off00013629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13629 17924 bytes
SHA-256: cbad44862e37e4f8dc80403edb3d4b377d76b1a308d024e7b2b52386d34a7cb4
font_01_sfnt_off00016596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16596 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DAD 11032 bytes
SHA-256: b490c063d8b24da9e0a458fa88ffe4e24b1883cd5c7c8293cff25602f4818269