Malicious PDF — malware analysis report

Static analysis result for SHA-256 026cee4ed5612c7b…

MALICIOUS

PDF

92.1 KB Created: 2021-03-09 07:00:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b30e0da6acdd29f7a5cc1e5d06ed927f SHA-1: 373cd24c8b48d1e6cded95fc952d7ac98543b947 SHA-256: 026cee4ed5612c7bcb0955af076708167e5f05266d03269ef43c787d3016adf0
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, many pointing to disposable hosting, and is identified as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or SEO spam. While no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://zajinet.ru/award?keyword=sust+admission+test+question+bank+pdf PDF link annotation
    • http://fituxem.sportsontheweb.net/wopufajid.pdfIn PDF document text
    • http://gejobukopap.iblogger.org/pupatitumepujonodipavax.pdfIn PDF document text
    • https://wuwenesugujiku.weebly.com/uploads/1/3/0/7/130739695/6332425.pdfIn PDF document text
    • https://rugepokowefi.weebly.com/uploads/1/3/5/2/135294276/6746757.pdfIn PDF document text
    • http://zunololanuxigu.sportsontheweb.net/ethical_hacking_course_syllabus.pdfIn PDF document text
    • http://tamodemuror.getenjoyment.net/27206160699.pdfIn PDF document text
    • https://zukolarosaku.weebly.com/uploads/1/3/4/6/134662459/xafokoj_sekadixexizonoz_zamemipobav.pdfIn PDF document text
    • https://fozogefijegajor.weebly.com/uploads/1/3/1/4/131453134/xewovuwelil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_85baf8a2333c46eab4d2bfac461472d7.pdf?index=trueIn PDF document text
    • http://kuxutoguxigakob.epizy.com/motorola_hs820_bluetooth_headset_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/gibipuxedugedorov.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/ageing_population_in_india.pdfIn PDF document text
    • http://biwedudomobi.epizy.com/zilav.pdfIn PDF document text
    • http://patitoledoboj.rf.gd/95232712262.pdfIn PDF document text
    • http://jifisuxevizek.myartsonline.com/mazigeguli.pdfIn PDF document text
    • https://3485775d-af35-4505-8fb4-f6750f575e04.filesusr.com/ugd/42f18e_65a46dc1329f4c9084232e80f68bb27a.pdf?index=trueIn PDF document text
    • http://xamipekuxedatif.rf.gd/department_of_justice_report_on_ferguson_missouri.pdfIn PDF document text
    • http://tukudapig.epizy.com/gerumosuguzupodavesaxixid.pdfIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_33a52acbab63429eb6f4f8e024637ef9.pdf?index=trueIn PDF document text
    • https://7a3463bf-3117-47cc-940f-ad9d50d05675.filesusr.com/ugd/9f2514_d2b751fc494a4af392b93f01313881f0.pdf?index=trueIn 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC7 5376 bytes
SHA-256: 191bcd01e0d283ad65e5bca7b853278e3af0bbfa8932e861ed3f4db1d4530b5d
font_01_sfnt_off000110eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EB 7040 bytes
SHA-256: 366899db1a5a11e4ebb794c319107623a5c5624b5792a4ff82aa29fb22cd129a
font_02_sfnt_off0001271d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1271D 14580 bytes
SHA-256: 899d6b09f906895aefad8da608feee3ec8cacffcd07fa7d86757b4dc6cb7ce44
font_03_sfnt_off0001544f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1544F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378