Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b893577315f32a9…

MALICIOUS

PDF

47.8 KB Created: 2020-10-02 15:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 023c8b7970c75f5f86a0bb1958a9e945 SHA-1: 0f0da166a0487922ba5a120b71c99cf1c70166bc SHA-256: 7b893577315f32a9573862a72e47a4428a49f174ab8768226daa9af63bbb30f0
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/pify?keyword=comparing+apples+to+oranges+quotes In PDF document text
    • http://files.planoviolinlessons.com/uploads/1/3/1/3/131380814/7213273.pdfIn PDF document text
    • http://pimijelod.tonimullerpsychology.com/uploads/1/3/0/8/130814004/d6cc5f.pdfIn PDF document text
    • http://kosalus.pacifictrackandfield.com/uploads/1/3/0/8/130873872/c735832b.pdfIn PDF document text
    • http://files.sarahgillprojectmanagement.com/uploads/1/3/0/7/130776308/774adcf.pdfIn PDF document text
    • http://nuwifav.apneaodyssey.com/uploads/1/3/1/6/131637432/lezipenitux-remefesitikoju.pdfIn PDF document text
    • http://files.shifa-shop.com/uploads/1/3/1/4/131438809/fesojunerokir.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/aa42b954-6575-4581-908e-62caf72a910b/rewososemedezesipob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/331bd5b2-c43a-438e-ab31-1f0aa4375428/bavonodazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b87021b-f1f9-4e8a-9f66-30f7c4fb3d8e/84876002046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3467/5880/files/peluvogepavulefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9798/1085/files/67004206309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0104/0024/files/kolokoxelinivewamafe.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_off00006f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F19 5168 bytes
SHA-256: d3a7d361d269c9f8d5ad0ec1a12f85b696f6e02e642fdced234a37d133e9ee3e
font_01_sfnt_off00008096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8096 10560 bytes
SHA-256: b0499a1b5d0d845120399943cebcb26961ee631eeb270e6f2a4f60903291d939
font_02_sfnt_off0000a49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA49A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333