Malicious PDF — malware analysis report

Static analysis result for SHA-256 9075226a416529f2…

MALICIOUS

PDF

55.3 KB Created: 2020-11-09 03:32:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 70c278a58188cab53216873c682d1a28 SHA-1: c071f3623a622392cc61476c1718bd68f6f3c5f9 SHA-256: 9075226a416529f2e5da41ba301353ed4475d653c3af6996f90f5c9851d35bfc
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/123?keyword=teechip+website+review PDF link annotation
    • https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/c92a22.pdfIn PDF document text
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/1692507.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://s3.amazonaws.com/zunaduxa/liwugemenudikelalukaroz.pdfIn PDF document text
    • https://sufuvuse.files.wordpress.com/2020/11/3074016501.pdfIn PDF document text
    • https://ligakojuso.files.wordpress.com/2020/11/22082593583.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/63698595454.pdfIn PDF document text
    • https://gukoxawe.files.wordpress.com/2020/11/tezazivosafirivevir.pdfIn PDF document text
    • https://xanafegeze.files.wordpress.com/2020/11/49035677209.pdfIn PDF document text
    • https://tafexoru.files.wordpress.com/2020/11/3294531957.pdfIn PDF document text
    • https://lidubopiniv581168368.files.wordpress.com/2020/11/33302270791.pdfIn PDF document text
    • https://suvarofora.files.wordpress.com/2020/11/lodebukiworidu.pdfIn PDF document text
    • https://basulirezono.files.wordpress.com/2020/11/cambridge_english_pre_a1_starters.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_off00008a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A19 4592 bytes
SHA-256: e08e2ef236a0093c7a7694ef06ee2c161d7a218a6f14b3c0f3ba7213f985a4c2
font_01_sfnt_off000099d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99D6 11808 bytes
SHA-256: d4c2f2c293f6acbb4c4a43c53d4f5c7ccfa9f88d8012272816d16cb92ac30163
font_02_sfnt_off0000c21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC21C 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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