Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f29f13f00733f44…

MALICIOUS

PDF

48.7 KB Created: 2020-10-14 18:58:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 67d44b7aabcfbec41511adb80ba8f725 SHA-1: e02ddeb25f9aa4aa9a72d01bac53ffc878090517 SHA-256: 7f29f13f00733f44f76c99d6be293ae4dae546e333fec54026dcd86f0b13d0bf
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://ttraff.link/pify?keyword=tensor+algebra+basics+pdf In PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/bewomo.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7304884.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8279037.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f871c5d4a895.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_5f870b6915331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f87090738e37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f86f61f943b9.pdfIn PDF document text
    • https://site-1037138.mozfiles.com/files/1037138/bevolokagipesasiroguse.pdfIn PDF document text
    • https://site-1042734.mozfiles.com/files/1042734/61883504503.pdfIn PDF document text
    • https://site-1044297.mozfiles.com/files/1044297/zukabixotojexepug.pdfIn PDF document text
    • https://site-1039449.mozfiles.com/files/1039449/62629945063.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/bumumobo.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/nukunuraki.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/5238855.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/bilorezelilawu_kekepi_ruvazevi_tukiriz.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/vifotatilaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/1873/0902/files/webelapololopetapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1624/1831/files/disable_blood_moon_minecraft.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0250/5633/files/52848552931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2392/6949/files/scherm_draaien_android_9.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_off00007f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F28 5412 bytes
SHA-256: 2633f1429a34d320b79ae645aa92eb8fbac5130f07d5e620663360e3a294bb1c
font_01_sfnt_off00009198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9198 10480 bytes
SHA-256: 19efbb2c0c1c5516002bed324a8abb38cbd4e3141c54a9f3bc61b1a6685ef95a

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