Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6f22200e507623…

MALICIOUS

PDF

52.3 KB Created: 2020-11-07 21:09:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 22d0dd2260e7c682a620237089c705b6 SHA-1: 31a50db481b807e934a5be66658281abc6b75d99 SHA-256: bd6f22200e507623c6be58166106290bd7ab2d5cb27c65562b9e4f4ff1d750b0
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffset.ru/aws?keyword=fgo+christmas+2018+farming+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417983/normal_5fa5fd7338be5.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/09b03b.pdfIn PDF document text
    • https://gowiwoniba.weebly.com/uploads/1/3/1/8/131857243/godebisewolasexisavu.pdfIn PDF document text
    • https://fafugugopogewip.weebly.com/uploads/1/3/4/4/134464831/4707264.pdfIn PDF document text
    • https://gizojobov.weebly.com/uploads/1/3/4/4/134436228/jaxalofojipeniti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://jejagake.files.wordpress.com/2020/11/77880376258.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/poveroluwonilo.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/physics_matters_workbook_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e1158b3-f5ff-4c7c-b19c-8ca38f078f0b/99117687018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51cba9ea-dc34-4a77-b411-c03750d58a7e/61963407042.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37168b1e-773d-431c-a6e0-c9ff4deffb50/free_chat_room_farsi.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6473 4060 bytes
SHA-256: 20a29be66d408236316b47d1aa23fe7346d064f39015681ed4acecff432d2fc9
font_01_sfnt_off000072d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D1 5876 bytes
SHA-256: 32c1c3327971ea687e14012a675c4b2dde851189385f8fadfedce58d69021ffd
font_02_sfnt_off000086af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86AF 11928 bytes
SHA-256: 114a8191d31133f1b2f6145c080307f3662425c931b25755120f84dc46700256
font_03_sfnt_off0000ae85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE85 16328 bytes
SHA-256: 9a3f393acc460ee5fb3fabf83968c14cf74e71a32f5986ff9de267538d7adf79

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