Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6ee99511b40b71…

MALICIOUS

PDF

45.2 KB Created: 2020-10-05 02:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 478b892613ca04ab07318fcd215f0b88 SHA-1: e8c83d4aa36052422b64e5db7b6c97ec242d13ed SHA-256: 0a6ee99511b40b717f4bf9c9f75633a8c1df56e53ff24033f9363693e1fe149e
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://ggtraff.ru/strik?keyword=arihant+mathematics+for+iit+jee+pdf+free+download In PDF document text
    • https://site-1036820.mozfiles.com/files/1036820/vavepewigevusobejewod.pdfIn PDF document text
    • https://site-1043603.mozfiles.com/files/1043603/10513775516.pdfIn PDF document text
    • http://files.surrenderedtochrist.org/uploads/1/3/1/4/131453061/tufiwowekara.pdfIn PDF document text
    • http://files.pecd.us/uploads/1/3/2/7/132712373/fotutonuse_jimurekuzizof_nisix_nubidu.pdfIn PDF document text
    • http://files.rmackson.com/uploads/1/3/1/4/131453188/sugazimako_woxemowijezod_lowowe_bataxalaledo.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/63084546-eeb1-4b2e-8c47-416d85b2ab74/mimexovuzaromumixedovul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93638f9b-e224-410b-9363-a5f141f3dac2/50653755025.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23140241-e270-430a-8245-eeb152541afd/lanarepivekimarovowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48354a83-6b0b-498d-b7c8-d0afefcde920/zozon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01b1afba-1058-4f48-bb9b-bbf29af089ae/65588655263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae7c601a-3db9-4633-bd5c-3091dee0526e/42851959964.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C81 5552 bytes
SHA-256: 9a17980bbedb2186806e7e5d314b5c0e3a2d0c6b920e9e1ce7f863d3596d9ff4
font_01_sfnt_off00006f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4A 2116 bytes
SHA-256: 89454d8ece1be00d2333aac76955f46ed17c4d141322e635bf27f42efb43e54e
font_02_sfnt_off00007916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7916 15144 bytes
SHA-256: ae48f5a265bf5199b7d40406ffb7eadc27e76d760a16f08a36b23a0fb305b527

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