Malicious PDF — malware analysis report

Static analysis result for SHA-256 b43e396b88dd61e7…

MALICIOUS

PDF

40.6 KB Created: 2020-10-25 10:57:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 4edcdb264dad17436d2ba0fc4acc48d9 SHA-1: 86461681a7e449b7a9f0865dfa0365a24d918490 SHA-256: b43e396b88dd61e770812ab23514ad410f9b663bb18374c663de32cce067030a
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.me/pify?keyword=arithmetic+sequence+and+series+worksheet+kuta+software In PDF document text
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/pixiwokafo.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/4918653.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/6465277.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nipomomuka_gisotufeje.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/pizemawozabiwi.pdfIn PDF document text
    • https://rutaluxunenore.weebly.com/uploads/1/3/0/7/130740368/83c3953f740.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/1/0461/4730/5635/files/87208365554.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7162/6652/files/office_365_browardschools.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8837/0582/files/concierto_de_aranjuez_sheet_music_guitar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0105/2836/files/fawekuxugumizawigexosufev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0056/8736/files/mortal_kombat_xl_mod_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5160/4885/files/masta_plummer_block_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0508/2780/files/zedorumaduvizolulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/excel_vba_print_range.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2045/8906/files/convert_document_to_powerpoint_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/bogor.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/pdf_file_format_software_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7f018a4-43fa-49ec-8c73-36784fb2c9cc/19930296760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2bbdd4b-8949-4fe6-8a52-6d39f223f6e1/65540242196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af069c45-2fea-44af-b011-18de562ca08a/3441384640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fce080e-ded2-4a0a-8af6-452eef2b3c6b/13816533736.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_off00005221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5221 5384 bytes
SHA-256: d81a68e4689bfefc9368bdc9b7ef70804a867c6d70952ab1fdb78333f6bafd94
font_01_sfnt_off0000644f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644F 10068 bytes
SHA-256: 1905b6e77fd05bf837298bce7dcbfab431b521da329c09a8aaee92b0e9b0f6bf
font_02_sfnt_off00008672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8672 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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