Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4509cb6a0868dc…

MALICIOUS

PDF

74.5 KB Created: 2021-02-22 15:39:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7a8c97507eaf64e875c9a6c11ec7f68f SHA-1: 1817b873d4efce1e2e90e2c11177689223195a47 SHA-256: 2e4509cb6a0868dc614488321e89feb65b5c9b351810e0329a6372893d151930
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or redirection scheme. The embedded URLs and the document body suggest a lure related to hacking tools, likely intended to direct users to malicious websites for phishing or malware downloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wix?keyword=how+to+hack+bloons+td+battles+with+cheat+engine PDF link annotation
    • https://gozikiri.weebly.com/uploads/1/3/4/4/134493270/1963446.pdfIn PDF document text
    • https://cdn.sqhk.co/ketejeti/jdehajb/jokivaromamiminekitopi.pdfIn PDF document text
    • https://cdn.sqhk.co/sufokorume/iieyZMl/app_assistant_apk_download.pdfIn PDF document text
    • https://girosiwubu.weebly.com/uploads/1/3/0/7/130740458/rifulumupusagisa.pdfIn PDF document text
    • https://kuvezuwuziteb.weebly.com/uploads/1/3/4/3/134388010/navekufebewofa.pdfIn PDF document text
    • https://dogaralezuj.weebly.com/uploads/1/3/1/6/131637140/badapejiku_jarezenixi_vozopajukig.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/fvha3nQ/gunshot_sound_effect_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453734/normal_600a642820e27.pdfIn PDF document text
    • https://bilugejedegigel.weebly.com/uploads/1/3/4/0/134017605/10d6223.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370791/normal_5fce2c5858124.pdfIn PDF document text
    • https://cdn.sqhk.co/leperanurosi/dhihbD7/project_manager_certification_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377109/normal_600013ec4c646.pdfIn PDF document text
    • https://lorerepurukese.weebly.com/uploads/1/3/1/4/131453396/d6bcade7bd.pdfIn PDF document text
    • https://mupexopuwes.weebly.com/uploads/1/3/4/7/134722910/ee6e5eb3a48.pdfIn PDF document text
    • https://cdn.sqhk.co/beluvano/ij6tHie/skylanders_imaginators_starter_pack_dark_edition.pdfIn PDF document text
    • https://lesapexif.weebly.com/uploads/1/3/1/6/131637780/70c0a30d1af.pdfIn PDF document text
    • https://fexedewikefitug.weebly.com/uploads/1/3/2/6/132681233/jukigaful_mowazi_nenavid.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuwagopole/iibjgcI/free_lives_homescapes_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406775/normal_5fe77838e9232.pdfIn PDF document text
    • https://pugufatafa.weebly.com/uploads/1/3/5/9/135967981/8070960.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ddc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC2 5364 bytes
SHA-256: fe2f35fdfd641651a5ec0952136bf4c75e5ed80e8ad0b506dab4d2c824274b83
font_01_sfnt_off0000f00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00C 13988 bytes
SHA-256: 77a6f15864febd03a8ff54e93119b2c26872379b0ba0ac442abdfa4fc2999a43