Malicious PDF — malware analysis report

Static analysis result for SHA-256 985877ff84833eeb…

MALICIOUS

PDF

52.5 KB Created: 2020-10-25 08:08:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 94a22576b007e83db853d53bfa7f95cd SHA-1: bac377b735cfae9f3b2e11606545a78857f6345c SHA-256: 985877ff84833eebd30d9fed28779cab3d72fd623d8c57af32ebd05d9285d361
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://cctraff.ru/pify?keyword=farberware+pressure+cooker+manual+recipes In PDF document text
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/nakoga.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/66b2ff97.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/kumefa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402503/normal_5f94e4434216e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5f8cb2fb4ef8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369516/normal_5f87bdd39aaf3.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000772e.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000772e.bin)
    • https://cdn.shopify.com/s/files/1/0478/1791/6575/files/mod_ngoc_rong_super_gold_cho_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6601/5396/files/bizolove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/2220/5095/files/16119971105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1373/4309/files/zakagadis.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/application_software_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/american_english_file_5.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/building_codes_illustrated.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/nyanyi_sunyi_amir_hamzah.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/balenib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b46f369e-f4ac-4afa-85f0-7af2175e8c19/18465110629.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2be611f4-3eed-4598-8bec-e629862e2418/81799587152.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27fe0601-5719-4986-a625-d0be5feb5c3c/go_tcha_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d2f771d-e16d-4d91-92cb-4019d5927765/86049481156.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/52209602120.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/forex_trading_fundamental_and_technical_analysis.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 extracted file (font_00_sfnt_off0000772e.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off0000ad42.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off0000ad42.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000772e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x772E 5332 bytes
SHA-256: 7c059bee4558821a4bd37be75e9f43d69c688a293009d1e3c212b27b66936ac1
font_01_sfnt_off0000894f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x894F 10696 bytes
SHA-256: 43bc2f3e389614b8a194ce258dde0fc7700f33af346fa468732f44a64fc466f6
font_02_sfnt_off0000ad42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD42 16448 bytes
SHA-256: bc6d684f813ac1c32be8bd0fe15b7813cdddcd900b6f98dcbbe4bb93017ec79b