Malicious PDF — malware analysis report

Static analysis result for SHA-256 67db8e6b45c5d868…

MALICIOUS

PDF

45.1 KB Created: 2020-10-17 20:41:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 77c2c63734b3c834ea49d796efa02551 SHA-1: 40a2f853aa325b193e9dcde72ba90932b7cdf846 SHA-256: 67db8e6b45c5d868d92e5cd265a3222641c5eb4ea1787f6f39b6f468f03128f4
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://gettraff.ru/123?keyword=flipaclip+apk+for+pc In PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/4712428.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/gelifoga.pdfIn PDF document text
    • https://dujopoda.weebly.com/uploads/1/3/0/7/130739119/214903.pdfIn PDF document text
    • https://kagilovudugavap.weebly.com/uploads/1/3/1/1/131164538/pexuxulizifi.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3731638.pdfIn PDF document text
    • https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/sevon.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/wilaf.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/1867598.pdfIn PDF document text
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/loxalo.pdfIn PDF document text
    • https://ritibamubube.weebly.com/uploads/1/3/1/4/131437410/2724133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368745/normal_5f87a59076167.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f88a8a084dc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369487/normal_5f889d84ccdd3.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/26112f90-759e-4d92-b917-76cc8932bf60/50268619390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e34e600-fd49-4633-a0e4-24a312cc72e1/balipapevafevutusus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/665f186a-579d-4847-9c55-58c4c0d688b0/anatomy_and_physiology_an_integrativ.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ab2241d-cc2b-4359-9164-0ca4bf737d0b/84972397678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1628/8918/files/mlk_elementary_school_milwaukee.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0952/2845/files/94312948428.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_off00006812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6812 4336 bytes
SHA-256: eaa4d34647ad57b028991d267e83673c0c69608ee753e542485041e0113a7faa
font_01_sfnt_off000076c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C3 9980 bytes
SHA-256: 862d76f61039a9339166d52c541851190cfc39d6c711e693c6af8e334ae166b5
font_02_sfnt_off000098ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98EF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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