Malicious PDF — malware analysis report

Static analysis result for SHA-256 0befce62c3e1c6fc…

MALICIOUS

PDF

84.6 KB Created: 2021-05-29 05:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4a4f399b44bbeb33254adf35e8ba2b67 SHA-1: a8939b5797a7553a24e5c607f7500d35613408c9 SHA-256: 0befce62c3e1c6fcc265e9327f856c8c65af42fbb8a8b4f52dad46399852d67a
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The embedded URLs and the heuristic firings indicate that the primary purpose is to redirect users to malicious websites, likely for phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=que+es+un+resumen+ejecutivo+de+un+proyecto+de+investigacion PDF link annotation
    • https://wadodimimilupe.weebly.com/uploads/1/3/0/8/130873890/rexesodar-vitux.pdfIn PDF document text
    • https://gavabedaxi.weebly.com/uploads/1/3/4/9/134902957/zigudozi_jexomama_gifowavod.pdfIn PDF document text
    • https://numijiresib.weebly.com/uploads/1/3/4/6/134639859/duzedigudise.pdfIn PDF document text
    • https://xotinibawilufo.weebly.com/uploads/1/3/1/4/131437660/nuwaguzululitegedej.pdfIn PDF document text
    • https://nodopotol.weebly.com/uploads/1/3/4/0/134018708/durazi_fipimesikakomo.pdfIn PDF document text
    • https://wazexusevawixi.weebly.com/uploads/1/3/0/7/130776334/4efa583e2.pdfIn PDF document text
    • https://zizizibewanexu.weebly.com/uploads/1/3/0/7/130776642/3ff41cf.pdfIn PDF document text
    • https://nozipukox.weebly.com/uploads/1/3/6/0/136057246/1172358.pdfIn PDF document text
    • https://segoponozumi.weebly.com/uploads/1/3/4/0/134000249/jadojinazud.pdfIn PDF document text
    • https://nikevafojo.weebly.com/uploads/1/3/4/6/134680040/newujabi_vudutuwosixono_levonitagixaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388046/normal_5ff2817e4842f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501374/normal_5fea0341b8b25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448323/normal_5ff4dddbecb11.pdfIn PDF document text
    • https://vofoxefak.weebly.com/uploads/1/3/4/6/134645633/c2e25fba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456114/normal_5fd8decc844a0.pdfIn PDF document text
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/foxasudagufugo_bijikarunuxi.pdfIn PDF document text
    • https://gonokuxugun.weebly.com/uploads/1/3/1/6/131637302/1051450.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://uploads.strikinglycdn.com/files/a38e06da-2da6-4395-a12e-fed1268965a8/sosezan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/709b69aa-7c93-4ca1-8480-dcc7a4ea6b4f/bodagajiwukarupek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c96add67-de20-4122-90c1-541304f32c54/what_to_do_when_hp_printer_driver_is_unavailable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78f76cf9-ee4c-49fb-bf75-deb9c33c0d0c/tubome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad15c68a-61a4-40ab-9c80-673f5a70885b/do_chevy_equinox_have_engine_problems.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC01 5544 bytes
SHA-256: 00af9148408ec309f2e1092762a7f36d09d3b94363cce1573d3ba1cd841615f6
font_01_sfnt_off00010ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED1 11616 bytes
SHA-256: 8cc663739745289cd45f7ecb9a1b592685f7abe8bb7e78a6db42ebbea28ac867
font_02_sfnt_off00013486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13486 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2