Malicious PDF — malware analysis report

Static analysis result for SHA-256 217157c967809f05…

MALICIOUS

PDF

43.3 KB Created: 2020-10-16 05:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2a8c595b7ff10d627c0a0b412e6c0cce SHA-1: e1aa9be32af5718e7dbfe1f534353699e69e2c05 SHA-256: 217157c967809f05d0f826fdd5bfdc43caffa3a8d21e70902ca39bd061e07fe6
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://pepuzategazeg.weebly.com/uploads/1/3/1/4/131453576/9035824.pdf.
  • 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://gettraff.ru/123?keyword=metrology+and+instrumentation+pdf+free+download In PDF document text
    • https://pepuzategazeg.weebly.com/uploads/1/3/1/4/131453576/9035824.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/lixavej_rivutavipulox_vunezikavad_lirumonoguwako.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/1000608.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/tagodoboda.pdfIn PDF document text
    • https://site-1048248.mozfiles.com/files/1048248/54790209416.pdfIn PDF document text
    • https://site-1039610.mozfiles.com/files/1039610/64553000837.pdfIn PDF document text
    • https://site-1038337.mozfiles.com/files/1038337/55543533181.pdfIn PDF document text
    • https://site-1040620.mozfiles.com/files/1040620/topuxevolazalijur.pdfIn PDF document text
    • https://site-1040221.mozfiles.com/files/1040221/lajefejirunovuxisuxexizon.pdfIn PDF document text
    • https://gapefupekud.weebly.com/uploads/1/3/1/8/131871489/2006625.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/sasetex.pdfIn PDF document text
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/d25473453c10.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/zebapesuluboxaj.pdfIn PDF document text
    • https://site-1043669.mozfiles.com/files/1043669/ibm_storwize_v5010e_sales_manual.pdfIn PDF document text
    • https://site-1038527.mozfiles.com/files/1038527/mezutomigowirivo.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/b1dd3d2e-7fec-4c35-b6d4-d6c9018bf956/83836168401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb83f0d3-194c-40e0-858b-869b6ec2b2b8/megilizida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9672687-be4b-40c4-a434-bc065a3bdf2c/luruwonizuzaparegupiwiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2901a8f2-4a10-48f1-ac0b-1539dc7ef17a/84099191162.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46fa8eeb-5d62-4dae-bc63-0a79a21a0389/66752238091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fe33efb-8510-4a4d-9458-e37bc2b2eb86/64049184947.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_off00006795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6795 5560 bytes
SHA-256: addf1f3a6b1bb66f51b5e2b8a666d36716a3ab17993d93419fb2d98e72b5eceb
font_01_sfnt_off00007a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8C 10396 bytes
SHA-256: 33cf35729e2c6a04059c995f38ebca7ade148c115245a160ba69027d42ae3abb