Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae00301a828508d4…

MALICIOUS

PDF

41.2 KB Created: 2020-10-16 18:18:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0c075af0e97947ed780b171f6ffee2aa SHA-1: adaa1275124fd2c01bcf18f8ff4cb40680f85c6c SHA-256: ae00301a828508d4e443bdbbb833c3439c8cc818d95451f57c95f7438009ef76
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one specifically pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. This suggests the document is designed to lure users to potentially harmful websites, possibly for phishing or malware distribution.

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=process+of+oogenesis+pdf In PDF document text
    • https://nozagovedenide.weebly.com/uploads/1/3/2/6/132682533/6113657.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/tifuxasorelav-sunagutigu-gikisifexixabot.pdfIn PDF document text
    • https://ruwopevod.weebly.com/uploads/1/3/1/3/131397973/8e30cda.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/0c18874847f.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8709547.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/9714766.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/7826087.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/6579830.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/neziri.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/juwotiwanet-suvubix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c81facd4-d985-4cbe-a570-8075f3820901/ledefozux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ac7dff0-8b59-4cff-851e-4cd3efb77166/9635911738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfafd53b-74af-45e5-89fd-07ddece64728/xeridafidobiwub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05e80a37-3954-47e1-8e81-05d3353471f7/rezuxifivakeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c669816-a58b-4388-a885-02edb647f2a3/mulonideguposesijaxukajor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db285243-dba5-4969-bf14-55e0aa93d5c8/guvigukidirovutel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1466/2562/files/rejovoxexumelamuzajiduda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8366/8392/files/83806419941.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5625/0013/files/31689860973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7605/9290/files/calvin_and_hobbes_bird_tattoo.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_off00005db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB9 5080 bytes
SHA-256: be15c66f528529627e849c06bd71bc99368cd7e478f6c65786232b29b6844cf3
font_01_sfnt_off00006f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0A 12756 bytes
SHA-256: 8cebf126fee733c81a55ebf00a9e283d80f89b78708efaf90f3cbd3c19058e2e