Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bc84a213687cca9…

MALICIOUS

PDF

47.5 KB Created: 2020-10-26 19:11:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: e32f48cb2e7d605977daf3434d130ee8 SHA-1: 9fb3a613aec38bd39df8e5a7ad5e32daf21419d9 SHA-256: 2bc84a213687cca97dd30229a96b7cac14704ba11a3d80e9adb937ba82bf1040
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://cctraff.ru/strik?keyword=happy+birthday+cats+funny+gif In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f871d1e6b923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375504/normal_5f8f6fa3dc04a.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/pamagajabidafe.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/466202ec7e4d.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/fce9d115a45c1d.pdfIn PDF document text
    • https://tibulewozimok.weebly.com/uploads/1/3/4/0/134017320/4731570.pdfIn PDF document text
    • https://xanugobolenaz.weebly.com/uploads/1/3/4/3/134371028/nizatabofiruka.pdfIn PDF document text
    • https://vevejeda.weebly.com/uploads/1/3/0/7/130776099/wujumoj-womivuzile-subejivanoge-werowubara.pdfIn PDF document text
    • https://kamijiruwidezi.weebly.com/uploads/1/3/4/3/134387945/zawuvatezav_zumunarovekidum_xuwafusa.pdfIn PDF document text
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/zejarajakekonevid.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/xafuvebuzame.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/basimifirokusifodugo.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007896.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007896.bin)
    • https://s3.amazonaws.com/felasorarabipis/20258207602.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/88743093315.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/gesawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd8b59c4-c010-4897-934b-e71b4a326eb8/40990047762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8438f80c-e81c-425d-a042-4d98ed82faea/47020183039.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/definition_of_salient_features.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/81549880456.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 extracted file (font_00_sfnt_off00007896.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7896 5588 bytes
SHA-256: 900f59bbf1505890369be6bcf01572432e7a9fd36c51ce93c79215f2b45bf758
font_01_sfnt_off00008b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B86 11072 bytes
SHA-256: e31f6e67bd36424eadce7b6d2d017178a52b5e13fb1251a8ae34448353322ce7