Malicious PDF — malware analysis report

Static analysis result for SHA-256 75c99a8c04194c19…

MALICIOUS

PDF

35.4 KB Created: 2020-11-05 16:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: cbb4cf156003f80b02a1cae557d97b36 SHA-1: 1bcc1f8ae8d935d4dbbc9d991862c34d2d340b6d SHA-256: 75c99a8c04194c193028443eba85fcfebaac9a914ad05ebae49cb6f9fe2efcc3
136 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.
  • 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/strik?keyword=franklin+planner+refills+classic PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426688/normal_5f9f5bdc0e4a6.pdfIn PDF document text
    • https://xotuwajugi.weebly.com/uploads/1/3/4/3/134349857/lejupiforumo.pdfIn PDF document text
    • https://risimukino.weebly.com/uploads/1/3/1/3/131383953/dalud.pdfIn PDF document text
    • https://vuzirokisex.weebly.com/uploads/1/3/4/5/134576988/3871666.pdfIn PDF document text
    • https://kefanizitadibuz.weebly.com/uploads/1/3/4/3/134328212/3dcc0e35f0a4dcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393188/normal_5f96f29dea1ef.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/e8b61f55-449c-435f-8c8c-c213f800170d/rifarejefapir.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/black_night_fortnite_shotgun.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/gibikenaromuv.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/2006_cbr1000rr_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/ganoket.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/78374101677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/659bfec5-31a2-44ea-b83c-32dc40f10a58/pipixexavisobuket.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_off00004c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C70 5028 bytes
SHA-256: 8db5602652b6da36474743aabe15a5eba0783ff38428b4c940573a190c03a357
font_01_sfnt_off00005da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA3 10212 bytes
SHA-256: 52c354c3eb389260b5c856cb8ea5670b97a8eab8e1c2f0811267ca5d6ec53fc3