Malicious PDF — malware analysis report

Static analysis result for SHA-256 678b545015fc0cff…

MALICIOUS

PDF

40.3 KB Created: 2020-11-01 21:02:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 2a8f9ed78735152788eecda7b31d7640 SHA-1: 6c305053f47bbc6908edb5055bcc57ef2d9ad6db SHA-256: 678b545015fc0cffdad726002e3e4d0f8ecb3bab990f9b507ea2494dd69f301e
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?keyword=what+is+salt+weathering+for+kids In PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/ab86159a3.pdfIn PDF document text
    • https://kawewadibuporak.weebly.com/uploads/1/3/4/3/134371142/8834600.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/dujizipana.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/a86ef7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_5f94c0f2e5d76.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/kobibiguluxesifazo.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/d66b7555-256b-4e78-8b61-4920e84ce492/vujenapikirotejapizabo.pdfIn PDF document text
    • https://s3.amazonaws.com/newopetusam/39386874360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6203a4c6-a847-459c-8eff-d657a7d63dbc/ropugoguvikojan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3d17a61-82b9-4467-a56b-be59a9314d80/ziwawirele.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/html_codes_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/carnatic_wars.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1482f8f-8fa7-464e-9d73-105895a3bb23/suqah_slayer_task_guide.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_off00005f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2C 5340 bytes
SHA-256: d3010de8b404102c550964f1e34658b4212b032db941444339826eb02d733b0c
font_01_sfnt_off00007169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7169 10216 bytes
SHA-256: 98b9396f513e0c34b0f537d39b1044797294860489c6ccb78e4cdb1a0fd0c8ab

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