Malicious PDF — malware analysis report

Static analysis result for SHA-256 8adb7b7756df6bc5…

MALICIOUS

PDF

62.9 KB Created: 2020-09-30 23:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 089683450c7bd0035894a57bbd127206 SHA-1: fd0f73d1f6a5d08aa465b75a78cd34d23f078e82 SHA-256: 8adb7b7756df6bc5abf3ee2d44a98d08eb063fd040f3406f771d86b9c1bbd42a
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/strik?keyword=new+sat+preparation+books+pdf+free+download In PDF document text
    • https://site-1037125.mozfiles.com/files/1037125/pesefujufin.pdfIn PDF document text
    • https://site-1037276.mozfiles.com/files/1037276/nolozuv.pdfIn PDF document text
    • https://site-1036779.mozfiles.com/files/1036779/jelak.pdfIn PDF document text
    • https://site-1036800.mozfiles.com/files/1036800/zefefaj.pdfIn PDF document text
    • http://wuvera.latestprojectlaunch.com/uploads/1/3/2/6/132681144/solupepurakujex_difij.pdfIn PDF document text
    • http://rawozeref.debbieyoung.co.uk/uploads/1/3/1/4/131406798/8193974.pdfIn PDF document text
    • http://faborofe.silverjinnstudios.com/uploads/1/3/2/7/132740805/7844799.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4710/6213/files/16720448779.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/kuzanemepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/vijizokov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5637/3670/files/vunivexidamukukanuwagifiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6997/9289/files/11674338707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a9bb880-b0fa-4bd3-a940-e773d97583a7/lotajukalopoxedol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e313563-340c-4eab-9fd6-5b054869d393/padobepubotelazex.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B2 5300 bytes
SHA-256: c60e4aff28885ff853a783d36b36eb5913a303a3ad0007748e6937e4694ca047
font_01_sfnt_off0000c9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DC 10772 bytes
SHA-256: 5105c8f912487891aace2404441560a447423a8e25813529117f23b8b7c7a253

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