Malicious PDF — malware analysis report

Static analysis result for SHA-256 42bd531469f08d65…

MALICIOUS

PDF

46.5 KB Created: 2020-10-30 10:41:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: c6549fdfae6c0e0809b2ca8df4eacb59 SHA-1: 5c2e41efb36f2214d79f534e90b55c478c9b1607 SHA-256: 42bd531469f08d655e649dea4236ffab97a762ca535f11a03820066b15cfa67b
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ttraff.cc/123?keyword=graphing+rational+functions+examples+with+answers+pdf In PDF document text
    • https://gogiwujuduk.weebly.com/uploads/1/3/4/3/134352159/fanaf-botidejifa-zimusedijim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369932/normal_5f8ce94dd9f44.pdfIn PDF document text
    • https://fimetopim.weebly.com/uploads/1/3/4/3/134399480/jepep_namuj_nuzegerepap_ponelitinekifu.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/tifuxasorelav-sunagutigu-gikisifexixabot.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/wodabaxazugiwafab.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/1/0434/1779/6775/files/bufifan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8387/2453/files/november_2020_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5698/2937/files/pre_ap_biology_final_exam_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/descargar_diccionario_biblico_reina_valera_1960_gratis.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_off00006b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9F 2880 bytes
SHA-256: 5f03d2c6bc08d28d18892b3fd5153044a2fff6aad81dd629dfd07635bf6cf50e
font_01_sfnt_off000075dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75DC 5760 bytes
SHA-256: 61c2196bddc8fe9d482f87607ab91f215c8b1e803eb5ad8594672dbe4e0cbdd8
font_02_sfnt_off00008967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8967 10352 bytes
SHA-256: 23a9417d18c61da2ce1597e2f01e67febeb7062d461af1305c40a5497b656fb6