Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b1855741c9d918c…

MALICIOUS

PDF

42.2 KB Created: 2020-10-30 22:03:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: cb1a391685003302ed0d6adfb9524b24 SHA-1: c7b557239110a67df670f2b29845147788007c8f SHA-256: 4b1855741c9d918c8946ed169fbe9dea6006c8c7a2942adbd452bc54d3b4bd0e
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://gettraff.ru/aws?keyword=bartlett+war+of+the+ghosts+aim In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384037/normal_5f9b46d2b29fc.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/e76aaa612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389394/normal_5f9a7deb69faa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f871c31f0533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376088/normal_5f8a16a7247a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403140/normal_5f91d41e4655e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3373/0458/files/eurolite_dmx_controller_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f569bb4d-9ab1-4b99-9688-3c758213f5d0/cantos_de_adviento_catolicos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b116f979-daf1-4b1a-9684-6e8b7afb1232/gawibape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/931058f4-de6a-432d-bcf3-e58d95e45af7/29553309170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8848/7603/files/yellow_wallpaper_discussion_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e6f8224-f2de-432f-8d8b-04b55a30b719/74631471552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/938b9afd-edf8-41b5-97a6-b6e0eaebef08/talorof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0388d03f-6163-4c8a-8b71-044c86907572/libros_de_los_testigos_de_jehova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff221ff4-90c3-4488-9622-018d912093fd/38694528343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5529/8742/files/hunger_games_district_13_filming_location.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5349/8019/files/jagepizu.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_off0000677c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x677C 5320 bytes
SHA-256: 4c1696f6c1a1b3d0225c123ff4db818a6428f22da05c006e052c4c9c660f6cb4
font_01_sfnt_off00007981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7981 10052 bytes
SHA-256: f41aaaf2ef0e4170d701badbd03476c569ba8a44c790d570b62475e5355c866c

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