Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e7d70125c4c6886…

MALICIOUS

PDF

46.5 KB Created: 2020-10-07 10:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e7e54dabcbc078a552f0e49fd6e886ca SHA-1: f23fefdda49d75c6e7deef60b95082b0d8be9d76 SHA-256: 8e7d70125c4c6886d6a617bd22110378b60583df8b7e3bda0d172eb7bfb192fa
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://gettraff.ru/pify?keyword=stand+of+the+swiss+guard+1527 In PDF document text
    • http://files.stayinalivelongbeach.org/uploads/1/3/1/6/131606819/b8d845d144c.pdfIn PDF document text
    • http://xibafe.spanishamericanmission.com/uploads/1/3/1/4/131437464/f53610aee9.pdfIn PDF document text
    • http://files.fivespeedfurniture.com/uploads/1/3/0/7/130776591/tonepewojevifumul.pdfIn PDF document text
    • http://files.osea101.org/uploads/1/3/0/7/130775731/6d09c53.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/869b213a-4278-4f5e-89ce-606edf99b879/bejifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35cb5290-d57b-44eb-a1d8-f41748ca2adf/44250775472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/230f1234-4711-4930-8328-d51de7d7f8c6/rusodakegiroraxosoneda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9333/4952/files/nupile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0913/7049/files/vuxovuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5685/6230/files/field_hockey_rules_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/288e576b-94f1-42d7-a503-631020b3d3fc/noxenotokenuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76c1011a-edf4-46c6-a7fb-321139f4ecd7/latizer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6258875-def7-4683-a363-f5593de3ba19/55898863833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5295f6dc-f4af-4717-b95a-154472ffa362/4149441435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b134d4b-1ea0-4fce-9e6e-d5cd3d96234c/33628798536.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_off000077aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77AA 5720 bytes
SHA-256: fd9439a75863e83b7e579acf3f3d071a6c0c1230e02818a0ce6b8795b4ac0145
font_01_sfnt_off00008b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B41 9948 bytes
SHA-256: 33af69509efd42f34549fd5c0f0fb9bcff50c6e52d0592c0b90eb3321bb4e728

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