Malicious PDF — malware analysis report

Static analysis result for SHA-256 be28fd96ab80ee50…

MALICIOUS

PDF

59.7 KB Created: 2020-10-13 14:53:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 45bf0c206966b526949a4eb01f44db1a SHA-1: f1bea213f4b6f419f44803559a8c3b0b55d03688 SHA-256: be28fd96ab80ee5021cfd599189fee6f569a1dd76d64b4f0c4e17528be401f76
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=fender+mustang+gt200+owners+manual In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/7971455.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/7d3707d5d.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/5473886.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/sefaritonos-nukivafeka-retisebop-regaxumex.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/caa64.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/624c7c39-a403-4f1a-a04d-96403d3f42f5/sowutavadodegibazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfdd11a0-ea3b-43ef-911b-19228809a577/gisapaxevotakasabofire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1548/7655/files/88359032418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8311/1831/files/land_before_time_ceras_sister.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4725/0837/files/babies_cant_wait.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2423/8757/files/how_to_earn_judgement_points_warframe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbf27fc5-f846-4f4d-85c3-b066d4708bfc/gakuzuvesukedepuxikokitir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c9d2b9-9b11-4335-bef9-f3ea1ea43ea8/44696828014.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E60 5468 bytes
SHA-256: 3d752e970c476cbfe0a2430724d64fc7283655d606733c29b7ea70cd58a7d954
font_01_sfnt_off0000b0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E6 2756 bytes
SHA-256: 1d570b37ff4915563b5f2697b305769735a71a541dbd068d2b85ceea65e75774
font_02_sfnt_off0000bc8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC8C 11048 bytes
SHA-256: 33fa58fbc4ba3b153b9a145db0f4390bd49b14c7a543d587db93ad5e51727e44

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