Malicious PDF — malware analysis report

Static analysis result for SHA-256 91975d1a421f46bf…

MALICIOUS

PDF

54.1 KB Created: 2020-10-21 04:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5698ca639748cb310c5ba5504cae8f53 SHA-1: e0cb65fe48031fc6b472953eddcb4a511a6c7799 SHA-256: 91975d1a421f46bf1e58b630af8b75cf3445019a998a08a6beb24cee5d856569
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?keyword=download+ultimate+battle+simulator+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367668/normal_5f8bf458e40bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5f88ad3f52bb3.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/426f5159d48011d.pdfIn PDF document text
    • https://pevinuwipe.weebly.com/uploads/1/3/0/8/130873962/8022475.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/fijijiweteredi.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/7226353.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/57a82c50-ab5f-4641-9fbd-f38dd77c0ab2/dictionary_of_symbols_chevalier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1423ceb-3d11-4922-ba2d-252ae46d31cc/kuvokipijunujaxidav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5d6168a-9036-44cf-88bb-921a10a46cf6/61507897666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/273249fb-fa45-4836-96c4-0708a4f90a3f/lediwafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/880cf249-f7b0-4b6c-81ec-091820022907/rotururuwexuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4eb93d2-2f0d-4fcf-bca1-508aa0c09d24/lupeleziwowugefeporis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4415/4791/files/three_dimensional_geometry_class_12_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6453/2900/files/82854383225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3827/6760/files/tofegimam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5817/5895/files/51650499373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1966/3522/files/graco_backless_booster_seat_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bd93159-f16a-40b5-9cc8-d81b424edfdb/dijozezuzoxaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6151c478-eec0-466c-aa69-8304536f5aff/40741412325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c799508-391a-4917-8eff-d57d29a4e6b0/lagiwekumutajukagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/388b1898-7b1a-4284-bff6-98aa03030a37/kobimavugosuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/238de471-1f20-4675-8b28-daf8a0331d0f/fina_logo_download.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCA 5204 bytes
SHA-256: 63f079740e061234423724efe61bac166af4f069bb2f4e8c48248e0b35fa5fea
font_01_sfnt_off00007e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E61 10180 bytes
SHA-256: f611baae5b06e68604b3ca64e8b65a92d989e00b29beec7d0b2b228a84beec0a
font_02_sfnt_off00009abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ABB 15312 bytes
SHA-256: b3a6da34dd5aa71b7633e0be0306eae8992d6d3a689cb2e841644d514ce693bd