Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d3b4b85600642b5…

MALICIOUS

PDF

127.2 KB Created: 2022-07-25 05:25:37 +00:00 Authoring application: valcha (via PDF Master 1.0.1) First seen: 2026-05-14
MD5: c8c7b0dc8779f316181b51b80d9b1d6f SHA-1: 2066250761346432c27bd70f20ae06456e91eb2b SHA-256: 5d3b4b85600642b5cc8414b5cd29ae1a10e48d9a12373bbfa1e68f2720c9e976
224 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0007

Heuristics 7

  • 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.
  • Cracked-software lure uses shortlink/download gateway critical PDF_CRACKED_SOFTWARE_SHORTLINK_LURE
    PDF visible text advertises a crack, serial number, archive, or pirated-software download and pairs it with a shortlink or encoded download gateway. This is a high-confidence social-engineering carrier for unwanted software or droppers; the PDF itself is not a parser exploit.
  • Cracked-software lure uses download-gateway redirectors high PDF_CRACKED_SOFTWARE_REDIRECTOR_LINK_FARM
    PDF contains multiple cracked-software/keygen/serial-key lure links together with long encoded download-gateway URLs or known crack-download redirector hosts. This is stronger than generic piracy vocabulary: the document is an SEO lure that funnels users through redirect/download infrastructure commonly used for adware, unwanted software, or droppers.
  • PDF link farm advertises cracked/pirated software medium PDF_CRACKED_SOFTWARE_LURE
    PDF contains many clickable links whose targets use cracked-software, keygen, serial-key, or warez vocabulary. These are SEO-spam lure documents that rank for software-piracy searches and route users to fake 'crack' download pages distributing potentially-unwanted programs, adware, or droppers. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://hardlyfind.com/ZG93bmxvYWR8cWQyT0RGek1YeDhNVFkxT0RJeE9EazROWHg4TWpVNU1IeDhLRTBwSUZkdmNtUndjbVZ6Y3lCYldFMU1VbEJESUZZeUlGQkVSbDA/cristobel?mulherin=nstunning.beihai/U2t5ZmFsbCAyMDEyIDEwODBwIEJsdVJheSBEVFMgWDI2NDM2U2t PDF link annotation
    • https://arteshantalnails.com/2022/07/25/lingobit-localizer-7-1-crack-free-beer/In PDF document text
    • https://www.webcard.irish/bleach-mayuri-ver-6-0-download-link-free/In PDF document text
    • https://khaosod.us/classified/advert/software-pembobol-wifi-for-windows-7-best/In PDF document text
    • https://npcfmc.com/counter-strike-source-2-5-2021-crack-indir/In PDF document text
    • http://valentinesdaygiftguide.net/?p=68907In PDF document text
    • https://rackingpro.com/wp-content/uploads/2022/07/CFD_2017_Crack_Xforce_Keygenepub.pdfIn PDF document text
    • https://threepatrons.org/news/flipbook-creator-professional-2-1-serial-full-exclusive/In PDF document text
    • https://shodalap.org/wp-content/uploads/2022/07/valkail.pdfIn PDF document text
    • http://divifreelancers.com/wp-content/uploads/2022/07/Lectra_Diamino_V6_Crack.pdfIn PDF document text
    • http://www.cocinarconmilagros.com/wp-content/uploads/2022/07/7_Data_Recovery_Suite_Username_And_Registration_Code.pdfIn PDF document text
    • http://rwpj.jp/wp-content/uploads/2022/07/Download_Windows_XP_SP3_Build_2_ISO_Amit_Talkin_Free_Downloa.pdfIn PDF document text
    • http://goldeneagleauction.com/?p=59761In PDF document text
    • https://www.atlaspain.it/crack-dirt-3-skidrow-41l-exclusive/In PDF document text
    • http://topfleamarket.com/?p=48930In PDF document text
    • https://btr-pen.com/wp-content/uploads/2022/07/AutoCAD_Land_Desktop_2009_ISO_FS_Link_TOP.pdfIn PDF document text
    • http://www.coneccta.com/2022/07/25/unigine-valley-benchmark-3-10-download-pc-hot/In PDF document text
    • https://marketstory360.com/news/75439/safran-morpho-mso-1300-e-software-download-new/In PDF document text
    • https://baukultur.plus/wp-content/uploads/2022/07/kalirand.pdfIn PDF document text
    • https://holytrinitybridgeport.org/advert/fr-configurator-sw3-software-46/In PDF document text
    • https://xn--traspasosenespaa-lub.com/wp-content/uploads/2022/07/remmuai.pdfIn PDF document text
    • http://www.cocinarconmilagros.com/wp-In PDF document text
    • http://rwpj.jp/wp-In PDF document text
    • http://hardlyfind.com/zg93bmxvywr8cwqyt0rgek1yedhnvfkxt0rjee9eazrowhg4twpvnu1iedhlrtbwsuzkdmntundjbvz6y3lcyldfmu1vbejesuzzeulgqkvsbda/cristobel?mulherin=nstunning.beihai/u2t5zmfsbcaymdeyidewodbwiejsdvjhesbevfmgwdi2ndm2u2tIn PDF document text
    • http://divifreelancers.com/wp-content/uploads/2022/07/lectra_diamino_v6_crack.pdfIn PDF document text
    • http://www.tcpdf.orgIn 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/xap/1.0/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://www.aiim.org/pdfa/ns/extension/In PDF document text
    • http://www.aiim.org/pdfa/ns/schema#In PDF document text
    • http://www.aiim.org/pdfa/ns/property#In PDF document text
    • http://www.aiim.org/pdfa/ns/id/In PDF document text
🗂 Part of campaign: secureserver.net 1471 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2669 84508 bytes
SHA-256: 2b7ba551bea82cc3307397981c1dbeb1b78486f95f2eb14e5e58d4e1b24edb0c
font_01_sfnt_off0000ae55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE55 83036 bytes
SHA-256: 6d13e73e85a502a13969f6a5eaecd0b275a0868c045f80b7d64ed55d70678261