Malicious PDF — malware analysis report

Static analysis result for SHA-256 e89590b8b4414a36…

MALICIOUS

PDF

40.8 KB Created: 2020-10-06 23:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0600f8f73bb8448abaea1c8d034d609f SHA-1: ee7373c4a7a11849d57ed1312fea2bd274b07440 SHA-256: e89590b8b4414a369d5046a2870783f3c4901e996103032451bc09fb778626ed
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://cctraff.ru/strik?keyword=examen+planea+secundaria+pdf In PDF document text
    • https://site-1036775.mozfiles.com/files/1036775/12117830458.pdfIn PDF document text
    • https://site-1040125.mozfiles.com/files/1040125/5513192287.pdfIn PDF document text
    • https://site-1039002.mozfiles.com/files/1039002/xusasilewove.pdfIn PDF document text
    • https://site-1037204.mozfiles.com/files/1037204/wopinuvezemipejoduwunu.pdfIn PDF document text
    • https://site-1041378.mozfiles.com/files/1041378/sunipoxomuz.pdfIn PDF document text
    • http://rovujo.mysje.org/uploads/1/3/2/7/132740267/biguwokep.pdfIn PDF document text
    • http://files.genevaalterations.com/uploads/1/3/1/3/131398385/390a4c1.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/dba541ad-5678-4b8f-b80a-4656e93aa326/20002957407.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8794b106-2c30-4233-bccc-5578ef222aea/28656678468.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea873648-f5a8-46b5-b00c-a6238b7fe58b/pefobazokupokovewan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b8aae6d-a8e0-40ef-bbfe-9139053e0580/tamixedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05c6bf4c-f61e-4bd9-b095-3b92f2921410/nexodira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0536/6431/files/universal_remote_control_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8847/8365/files/vumesapedawefotonalurud.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_off00005df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF6 5328 bytes
SHA-256: c232d609b1b4ef380238f65a925e030a95eb3af0e705f1033c9defe905b53211
font_01_sfnt_off00007002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7002 11424 bytes
SHA-256: 8c7dcd4c0e1a6469ee1c793c3cc4992337128f57a1ddc4318ae98052bcce91d8

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