Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f484429d2011b79…

MALICIOUS

PDF

47.6 KB Created: 2020-11-09 08:56:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 6d84f41f48e017b3a52452f4c2f2fde7 SHA-1: 3a157616912ab8a7d8ab4a6596d867ce284df675 SHA-256: 1f484429d2011b79f7fb77929117d88c86e49879d57dbe9a37c64e62ec2662c2
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=conceptual+physics+chapter+3+review+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450240/normal_5fa86abc0dfbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5f997c21b6eb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369322/normal_5f95afaade2b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409409/normal_5f9a11512543f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369149/normal_5f93dcfc30ce4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384299/normal_5f8cc9583d019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386337/normal_5f8df9af70441.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/f425fdd5-73e5-4d4a-bf69-6264c78ad4e1/junjou_romantica_season_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/024a4ff9-3d60-496c-b591-b2fb3584286f/waninaredifavenagos.pdfIn PDF document text
    • https://tibepitetuj.files.wordpress.com/2020/11/tekomutamatope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4005c2ab-348c-4d22-b192-5ab49d716236/wivepoxizab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b7d5375-b3be-44f9-8c8b-e7968e91896f/databases_illuminated_3rd_edition_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c57b8b2-e77f-45dc-addf-0abbad0102bd/dasor.pdfIn PDF document text
    • https://solavaje.files.wordpress.com/2020/11/35657448797.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_off0000794e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x794E 5344 bytes
SHA-256: decf20f5c498e8ebd93c1334261ebb2980d2ee907587556d2414cef1f26c5bc1
font_01_sfnt_off00008b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B86 10924 bytes
SHA-256: 7705bbf1d1496afde982b331554f209879a8020d9963b2327adcbd4e0c8c470f