Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa37cb75419b21c…

MALICIOUS

PDF

42.2 KB Created: 2020-10-16 10:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c6d44dc1a5db61f8b601b2146b286277 SHA-1: efa7f6a2c2514fbf48230bae27b181601d9c6ba5 SHA-256: 4fa37cb75419b21ce4c41d70d395a7ab1d7f70e13fcd0835793811f2f99c2744
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=virage+ottoman+bed+frame+assembly+instructions In PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/bumefiruzarofeti.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/8c3f11ed.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/juvix-nuzefoxikalilo-mukopavojij.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/xojajuv-mitegejitokuxig.pdfIn PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/lejegumonivixaro.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/monirafulowafix.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/laresisif_kigadebokenub_bajutinerid.pdfIn PDF document text
    • https://xanodupujariris.weebly.com/uploads/1/3/0/9/130969381/75de7.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/mawozena-kewanobezure-saxekezato.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373511/normal_5f88bebc3786a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373757/normal_5f88c5ee8dd88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f87157dccff5.pdfIn PDF document text
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/6065401.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/zutakeloluzulusevosa.pdfIn PDF document text
    • https://giwakatunu.weebly.com/uploads/1/3/1/4/131437107/woxesegela.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/297604.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/1/0500/8221/8175/files/23571626235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8345/7197/files/62414800562.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0177/3731/files/29322993687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9546/7195/files/40991900021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7663/5812/files/the_gift_of_the_magi_writing_prompt.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_off0000583e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x583E 5432 bytes
SHA-256: 980a9fb9e01efcdc2f2f5b08b78db2905e598ed70fb1c0f6685849f6aa506b29
font_01_sfnt_off00006a9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9E 10068 bytes
SHA-256: 62c643447019417fff622915494d31382dcb0e2bd109ca9f653cb13571bea06d
font_02_sfnt_off00008cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CFC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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