Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1e5133a14ad202…

MALICIOUS

PDF

42.5 KB Created: 2020-10-12 16:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: ffe15de75f6d769ea294e3255219931b SHA-1: c3e023d91e65f5866c18328dba7bb3a50795eb88 SHA-256: 9c1e5133a14ad2027f0694c506f2de16638445aa67534618ff7a53835a4c2b47
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=convert+pdf+to+word+using+automator In PDF document text
    • http://zunen.pragathipadham.org/uploads/1/3/1/6/131637873/mobun.pdfIn PDF document text
    • http://files.purplegoosetogo.com/uploads/1/3/1/4/131438692/da649e888.pdfIn PDF document text
    • http://mugasofox.nkydogwalkathon.com/uploads/1/3/1/3/131378780/926355.pdfIn PDF document text
    • http://files.sled-revy.com/uploads/1/3/1/4/131483719/a323be.pdfIn PDF document text
    • http://files.oaclassical.org/uploads/1/3/0/9/130969184/visap.pdfIn PDF document text
    • http://files.sharoncarrjewellery.com/uploads/1/3/1/8/131856392/20e81405.pdfIn PDF document text
    • http://files.fondationjeanninemanuelgala.org/uploads/1/3/0/7/130738929/bagogupomagagar.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/1/0497/8412/7650/files/writing_electron_configurations_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6504/8733/files/poems_with_imagery_ks2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9888/9635/files/30277433365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5603/7017/files/paul_frank_bike_grips.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4249/5899/files/troy_bilt_bronco_riding_mower_drive_belt_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8888/5413/files/xerux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3042/9352/files/68830669060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0320/3751/files/hilti_kwik_bolt_3_8_x_5.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_off0000670f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x670F 5384 bytes
SHA-256: 15062e2150c9267221fbaa12b072eaa5ba03087d6716d479a3a37109dd17f89f
font_01_sfnt_off00007963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7963 10420 bytes
SHA-256: 0c5b9d3b22239e9d83d65937ce74d6ff696427e603a5d173d55e17aa0a93ee09

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