Malicious PDF — malware analysis report

Static analysis result for SHA-256 3efa05a634c78e71…

MALICIOUS

PDF

73.7 KB Created: 2020-12-28 16:58:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 3fc6ffceb731f3176abfa21abd632542 SHA-1: 2bc8cf7bff42adaa4340d2c63b56f693d5501b85 SHA-256: 3efa05a634c78e7139d29001a80b1360b1c9be27f4c56fc66ac3f7129b089bae
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=peter+pan+movie+script+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5f8c24d8185c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467287/normal_5fe81bce3ac4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417308/normal_5fae04a003718.pdfIn PDF document text
    • https://cdn.sqhk.co/zipodumup/jPzgfgc/dibaxewizut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417527/normal_5fe77944cbffd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391317/normal_5fd1a454473d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459916/normal_5fdb69e49d20f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0f234cb-3244-4d98-9ccb-c73249fe8109/zed_tft_set_2.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/15671766404.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1f85a8d-2c32-40c4-ab2e-3c5f0559909d/lock_screen_windows_10_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/cadence_park_school_staff.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/catalogo_enelpremia_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/jogapem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bdbae89-47ea-47a6-85d5-450e762bebd2/2007_dodge_avenger_rt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7374757-d143-4f48-b20f-07d9dd8df183/nwu_type_3_boots.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE394 5328 bytes
SHA-256: 420c5e44ddc47015d46ea7a8b53eb412b3df124201c0f9cef1da43594530bf5e
font_01_sfnt_off0000f5a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A6 10708 bytes
SHA-256: 96bec58473b5329cefa9ffb3efde2825d1fc1b0bd8bdb5e55c8ee81f7f8a68fb