Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c3038b7cbad681…

MALICIOUS

PDF

35.2 KB Created: 2020-10-16 00:40:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 447cf131e544f0b1fe3d508b937fef34 SHA-1: eae6e267512cee5a8c7166643ab72dc602c8b0df SHA-256: 94c3038b7cbad6811c0c76251ba2f15169d61ece52a8504ff1343f53ab43bfb2
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/123?keyword=photo+video+maker+apk+d In PDF document text
    • https://site-1039923.mozfiles.com/files/1039923/jixisewuralumekalupejaloz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_5f88bf0e08dc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f872f0159e09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f87a9efb1941.pdfIn PDF document text
    • https://site-1040278.mozfiles.com/files/1040278/pibuxubigujijode.pdfIn PDF document text
    • https://site-1040209.mozfiles.com/files/1040209/59510820986.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/583a805a-79f8-4292-861c-23ce7842da35/dogotakoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/521ae6f7-06d9-4698-8221-7d585deec26b/17392121513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5ea508b-0492-4854-98ba-31976fd39f25/zawumasif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/640952b4-2d4e-4061-89b2-700f9e04fe82/61026308801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a849018e-193a-49db-8029-63c6db442d43/pisurezopivasikume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/010f4366-2747-463e-8c8b-722a5dafcb49/3668520628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d4cf820-2ef3-497f-9b24-40916c692284/madavekamukaxukuvefevuve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d37ab604-51ab-486b-86ca-0e512c217d48/xikodisikekinuja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc734b2e-824f-4ade-b7b1-07d8c4b96e72/solelin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c69e9bd-feaf-4d41-a1b7-9aa4115c77c5/wulunesumiremaje.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_off00004b84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B84 5116 bytes
SHA-256: 92e3dad4db9b7d5c32f500a541e7c1036d51af66668a391226e9df83f639cb72
font_01_sfnt_off00005cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC7 10360 bytes
SHA-256: fe0b91da187bf9e45982bfb485c555baadff4dbe321c2c5f8880caf20d595dff

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