Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f33db5c611d725…

MALICIOUS

PDF

58.2 KB Created: 2020-10-17 18:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: aca7b4120a044f21fe9746676b332a26 SHA-1: 4245c61a0f49f76313bd9fcb714a3567e4d2a978 SHA-256: d7f33db5c611d725c2e4ed513f1617dae9b8a349b3b8d33393447a7e131bcd6b
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://gettraff.ru/strik?keyword=skyrim+special+edition+guide In PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8279107.pdfIn PDF document text
    • https://femevidawivuk.weebly.com/uploads/1/3/1/0/131071063/4682934.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/magobopizopito-fedekuvajigin.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/1/0431/9418/7933/files/zelelurizetoxases.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1019/5107/files/lets_go_starter_students_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/6117/0342/files/91708674744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2939/3308/files/22839763606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/394ad9a9-e32e-45e3-b10a-159b5e84b12f/zesokevumisudanuligirali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56cec700-98fc-4b26-92e1-bfeab7e53db9/27182323884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7362acf-1ce1-4d53-9fde-d217dd2b5b87/67579367979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5474/3200/files/survivor_david_vs_goliath_cast_ranking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4869/7493/files/nudos_y_amarres.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bc498e3-fb70-4f04-8817-7840deeea9f4/91533244444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67d4854c-ece0-4899-a2b6-e00f6f696103/lavemokavuvubogalilida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/094f2d9b-e6fd-4d06-a7e5-fbaa71eff4ac/winebujabisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2530e8b-56e3-4b97-a0b1-3feef56cac1a/22831776491.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0595db26-ed9b-4cb8-b1dc-32d854ae9521/gafepugaxedekerovifiref.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/494199b5-487b-4c51-ba7e-c0a10700f200/zidulopeluvejed.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_off00009693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9693 5544 bytes
SHA-256: e9fbfe8a7e70dc8c43524d2dced7661d91155290fe2a40eebda81853e45a2f67
font_01_sfnt_off0000a952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA952 10588 bytes
SHA-256: 3fe1535c01c807442c548359df9c53ca5d11c56a75b07eafd1e0da617df6d87e
font_02_sfnt_off0000cd47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD47 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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