Malicious PDF — malware analysis report

Static analysis result for SHA-256 2130269f9a37b439…

MALICIOUS

PDF

76.8 KB Created: 2021-05-21 15:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b3feae4d73d0607d2170b1f091a036f8 SHA-1: e078ef1e9ef1151bf6737e7a7b83847c5f01e812 SHA-256: 2130269f9a37b439e34d7920f38bab7d7389d2ebcf190c67858c07e25c724d17
194 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 of which are hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The primary URL, 'https://maypoin.ru/strik?utm_term=how+to+get+free+airtime+codes+for+mtn', is presented as a lure for free airtime, which is a common phishing tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/strik?utm_term=how+to+get+free+airtime+codes+for+mtn PDF link annotation
    • https://tilakajunobeka.weebly.com/uploads/1/3/0/7/130739719/pexademudu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369794/normal_5fddf582cfcc0.pdfIn PDF document text
    • https://gojudewusidaza.weebly.com/uploads/1/3/4/8/134888042/3232612.pdfIn PDF document text
    • https://bexudedumazises.weebly.com/uploads/1/3/1/4/131406785/825a0952a4360e0.pdfIn PDF document text
    • https://woxamaxepid.weebly.com/uploads/1/3/0/7/130776503/nabovokagaviza_ximitezerami_sunigari_ganojib.pdfIn PDF document text
    • https://niforobufuxir.weebly.com/uploads/1/3/4/5/134512868/f654e3ac4b.pdfIn PDF document text
    • https://xonuvalax.weebly.com/uploads/1/3/1/4/131437330/ximisuruwepije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426819/normal_6060e8c586200.pdfIn PDF document text
    • https://relelije.weebly.com/uploads/1/3/1/4/131438324/513186.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424376/normal_6000e4d46ff4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424024/normal_604cbf6aa6e4b.pdfIn PDF document text
    • https://rerutafedebe.weebly.com/uploads/1/3/2/8/132815298/bexolobatiku.pdfIn PDF document text
    • https://bajipupetezin.weebly.com/uploads/1/3/5/3/135315063/fufemafatepukuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lawakux/where_is_the_goddess_statue_in_gerudo_town.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8b6ae86-ebcb-46a9-8970-5aed88c1c30f/52416832750.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/english_sentence_structure_book_robert_krohn.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/sedil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3683c1bb-422b-40bb-983c-4e16092ee923/gagukibitiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5ca11cf-21bf-4677-99e6-03c772d2e9a0/sri_lakshmi_narasimha_stotram_telugu_lo.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/gakezekunijutojo.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_off0000ec57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC57 5360 bytes
SHA-256: 0b6284c15c95e9af569c8456c2258df5c3b01679b47ba13ab44ca6dd661795a4
font_01_sfnt_off0000fe96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE96 11568 bytes
SHA-256: 7bc573596035d15cd8713c008a2f8d1ccf716060ff4f8556726a95ccd5fd7d95