Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b30a9705f04df9…

MALICIOUS

PDF

42.5 KB Created: 2020-10-16 01:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 27af3bd88be122892ef12802a46bd94c SHA-1: a92943290cf9dd72eb9d764722e9b6e6ebea97bb SHA-256: 09b30a9705f04df9a24692b40669b1c34e2fcebe815b94148757e34df879dee0
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/123?keyword=progressive+type+gearbox+pdf In PDF document text
    • https://site-1043256.mozfiles.com/files/1043256/wulutej.pdfIn PDF document text
    • https://site-1040506.mozfiles.com/files/1040506/82364049901.pdfIn PDF document text
    • https://site-1043165.mozfiles.com/files/1043165/sifulejudipiketur.pdfIn PDF document text
    • https://site-1039757.mozfiles.com/files/1039757/30642026783.pdfIn PDF document text
    • https://gexirirexov.weebly.com/uploads/1/3/0/8/130874239/b733cfda5df3956.pdfIn PDF document text
    • https://duxixujojive.weebly.com/uploads/1/3/0/7/130739103/junapew-xawikeletejo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/29ebe6e8-006e-472f-a5d4-d3ff6133ad57/12539352264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dac7aa4-a45b-4552-af69-6172d37530c7/19491527016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74c51e88-9687-4e28-b5e4-c634c720fc6a/44810449807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72df6edc-4877-49e4-b10f-229ad2efcf69/37799867703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afd22d40-b588-43d6-8485-b4ffde645c31/26047222347.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4361/7958/files/kill_thief_ants.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5490/2677/files/13981859607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6893/2767/files/tipefasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9604/2398/files/subtraction_word_problems_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aea37467-d032-4365-882e-9605aba75c40/zesadafilexew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e645a01-c7e4-4d09-9705-b1bf4cdd9e27/11108125275.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6781 5548 bytes
SHA-256: a1c8160ea3162228e2b6916aff1553f75147ff35b457c4577706a289e3185377
font_01_sfnt_off00007a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A81 10128 bytes
SHA-256: f4d7240f518972a013c30a828363cff36a8de8fc0a356d1e917d07fa28cc10f9

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