Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7c1613c565d668…

MALICIOUS

PDF

51.6 KB Created: 2020-08-02 12:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 451f7dda5e913d7c31282a229a6beccf SHA-1: 33eec3976e1d16028794f1687d668715432477a0 SHA-256: 0e7c1613c565d6686c9d7f7d5af413b73b317efc850449b73f41ef0a400a830a
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://ttraff.ru/pify?keyword=missile+wars+minecraft+server In PDF document text
    • http://files.vapeperfectstache.com/uploads/1/3/1/3/131379362/kuropikabenof_kamox.pdfIn PDF document text
    • http://files.nightsongpettingzoo.com/uploads/1/3/1/8/131871535/juwur-wovagomoguka-bedutemep-xomuraj.pdfIn PDF document text
    • http://files.vintagerhythmandbluesensemble.com/uploads/1/3/0/7/130738615/3929699.pdfIn PDF document text
    • http://files.northernillinoispainting.com/uploads/1/3/0/8/130814229/tebifitasufufutuk.pdfIn PDF document text
    • http://files.nostringspuppetworks.com/uploads/1/3/0/8/130874030/nijaxiromapazux_mufeduji_lapurof_milil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9904/6553/files/puts_on_sunglasses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/53979487819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2751/1961/files/95681456696.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1148/0472/files/ketolevojotowovar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0081/2952/files/minecraft_decay_enchantment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tadigepulimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3778/6266/files/xunomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4823/9257/files/ganafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5892/0605/files/gagapodevubobiziluge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/how_to_decrease_file_size.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/74003217650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1924/7514/files/malewujoriw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0632/8995/files/87476045918.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_off00007ea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA5 4864 bytes
SHA-256: e2dbb57eb5cf72f5fef2ed4844406140625c6e631e0acf0f374c024c171ab9d0
font_01_sfnt_off00008f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F1F 10684 bytes
SHA-256: f659a86d56f55855676068ba6687854164a150b16a6ad95066a6543b07dad97d
font_02_sfnt_off0000b372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB372 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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