Malicious PDF — malware analysis report

Static analysis result for SHA-256 b740a18b79a698d4…

MALICIOUS

PDF

53.2 KB Created: 2020-10-02 23:40:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: c8d102487115b894a701df921ca83bde SHA-1: 94d110ff6ec5b0ced136daad87329517df5605cc SHA-256: b740a18b79a698d49af54410fa774b5dd325096c81b808359f4e773975bc93bd
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=2009+mitsubishi+lancer+manual+pdf In PDF document text
    • http://files.rohanlankantours.com/uploads/1/3/1/6/131607063/zaraw.pdfIn PDF document text
    • http://files.hcl-informix-user.com/uploads/1/3/1/4/131411474/sajidozus_tobawakupe_baxuxe_libidulegij.pdfIn PDF document text
    • http://jorurabi.glissantstudies.com/uploads/1/3/2/8/132815015/9964732.pdfIn PDF document text
    • http://kijodure.backwoodsdogboxes.com/uploads/1/3/0/7/130740444/jaraxixo.pdfIn PDF document text
    • http://files.nutmegstatesoap.com/uploads/1/3/0/7/130776877/54179.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://uploads.strikinglycdn.com/files/d0df7af7-9eb9-4b82-8297-2191d014c9f9/fodumilipota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29f40a77-86bf-4741-b813-cad86742dfc0/69443898923.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3142983b-62e5-42e8-9c76-2fe5ffe09292/17103763248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a715700d-032f-4e61-a086-57cc1b436b88/45551071744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/pugimefudab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0499/7015/files/lumuser.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9433/4870/files/gixojutenafitoxovap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1651/8806/files/47491175684.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/wubaxunakukevidavaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/518ebabb-0ce4-4cf5-a227-5f599991edf6/risasewagebij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46c524bc-3d2b-46d9-afe0-4f28737040e8/jelikiwerunexiveturaped.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/573b6c04-8be1-4c2d-9347-107cf0067989/xikuwajurivaba.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7F 5640 bytes
SHA-256: 1cb5b5d210650d56f45bc42776063d0175a4d0e7d2b0b0fa2bc0dbe4131de898
font_01_sfnt_off00008d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D64 14284 bytes
SHA-256: 351ae391e3262bf5532c5d0412ffab1a578cbf4e4c3d9a32f9941fbf83fe5136
font_02_sfnt_off0000b98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB98B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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