Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2bc0afdb6b87b3b…

MALICIOUS

PDF

77.3 KB Created: 2021-04-14 20:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5b6c5dd98796323f71bfc3fe840d231a SHA-1: e61d6fb3e83b0c23d092b43ea76a67b5aa864fdf SHA-256: c2bc0afdb6b87b3b80db3df168a240dba30ae297eff91389fbde4dfbb3cb4f3f
226 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of a 'Password-protected archive handoff' heuristic indicates the document likely contains instructions and a password to decrypt a malicious archive. The embedded URLs suggest a link farm designed to redirect users to potentially malicious content, aligning with phishing and malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jacksth.ru/strik?utm_term=troy+bilt+storm+2410+service+manual PDF link annotation
    • https://xugeguva.weebly.com/uploads/1/3/1/4/131438310/c14029e538b768.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagoja/x0gdChh/auditor_s_opinion.pdfIn PDF document text
    • http://satogolijosefas.iblogger.org/15300193554.pdfIn PDF document text
    • https://nulokedebuzeb.weebly.com/uploads/1/3/4/3/134310318/cb98d74da1ea5.pdfIn PDF document text
    • https://disaximineta.weebly.com/uploads/1/3/4/8/134883765/biziti_bexonas_xanazop.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/33314800234.pdfIn PDF document text
    • http://javefuxola.getenjoyment.net/celulite_bacteriana_tratamento.pdfIn PDF document text
    • http://dosijefa.mypressonline.com/ethiopian_reporter_english_version.pdfIn PDF document text
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/444598.pdfIn PDF document text
    • https://cdn.sqhk.co/kuburarimoku/ij3gghd/html_bootstrap_one_page_template.pdfIn PDF document text
    • https://kuribigewisowe.weebly.com/uploads/1/3/4/6/134688213/jalisenorixinas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/kodogadegola.pdfIn PDF document text
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_f85cb7a446864776acdf0fc7f95b5991.pdf?index=trueIn PDF document text
    • https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_7d0dca7f71eb42af894723088654ebe0.pdf?index=trueIn PDF document text
    • https://104e3d6a-8609-4a5f-ba89-88df40aeb326.filesusr.com/ugd/3cb22f_9ea4f8bcd8f34bb19c32299d344778f6.pdf?index=trueIn PDF document text
    • https://da6a6a96-7907-4aac-bfe3-592928b14ca9.filesusr.com/ugd/39e844_49a69d97009048abaabc0de7ad6a26e0.pdf?index=trueIn PDF document text
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_7e96b0aaad9d4407b30644f51f1426c1.pdf?index=trueIn PDF document text
    • http://gejagixuz.epizy.com/1979_cessna_172n_poh.pdfIn PDF document text
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_b06a4abce9b44aee91f7793832026bb0.pdf?index=trueIn PDF document text
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_8604759eb9084dc7b2bd69351a9ee96a.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC17 5608 bytes
SHA-256: 8a354eb0478a105e25d5b44c068ca7c0a53441f1890dbca689ba34710fcf20c5
font_01_sfnt_off0000ff2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2C 12164 bytes
SHA-256: ce1ead7748d7e4aacabd23f4f709e0d6f00e2a58939ff986a885087b2b4da2c7