Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5b31d58856afc0d…

MALICIOUS

PDF

69.4 KB Created: 2021-02-28 09:05:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bb920d1db2f8288a27ea74c06a714ff6 SHA-1: fc81b7f925829b3518049c52b7ae90d1f71a22ba SHA-256: a5b31d58856afc0d6c10e05884c35ff244d22e271d4966bfac541f443723d46b
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/award?keyword=subject+and+object+pronouns+worksheet+grade+2 PDF link annotation
    • https://cdn.sqhk.co/vupapevixu/jahcge1/sutatena.pdfIn PDF document text
    • https://cdn.sqhk.co/limiwebu/jhgjqij/wedukifetafukojavekorosi.pdfIn PDF document text
    • https://cdn.sqhk.co/divoxisig/iJHS0ct/21594156021.pdfIn PDF document text
    • https://welomutulek.weebly.com/uploads/1/3/4/8/134873792/9a5c89e0ccf1.pdfIn PDF document text
    • https://wunogalabapa.weebly.com/uploads/1/3/4/6/134603674/9759722.pdfIn PDF document text
    • http://tevutubiwij.getenjoyment.net/gejodaxel.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/7376801297.pdfIn PDF document text
    • https://judexesadizit.weebly.com/uploads/1/3/0/7/130738912/bukokikipuniromoke.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/sunozuweparirixe.pdfIn PDF document text
    • https://kekisuganuzab.weebly.com/uploads/1/3/4/7/134721312/f031ba3bb.pdfIn PDF document text
    • http://dapajurop.mygamesonline.org/96389137322.pdfIn PDF document text
    • https://jupedozezuwobig.weebly.com/uploads/1/3/4/0/134040413/fojoba_pexopi_likorin_vanumaboselubuk.pdfIn PDF document text
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/fexalinamipelis.pdfIn PDF document text
    • http://zefoxerufizogo.22web.org/6244491631.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sogivuwe.onlinewebshop.net/robertshaw_7200ercs_pilot_light.pdfIn PDF document text
    • http://zudupaxub.myartsonline.com/is_the_boy_who_harnessed_the_wind_nonfiction.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/wuguxozu.pdfIn PDF document text
    • http://belibivizonojo.myartsonline.com/what_does_zero_dipole_moment_mean.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/the_rosie_project_book_club_summary.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_off0000d15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15C 5908 bytes
SHA-256: d0d34ab6c6582594c03a34b7c11f50bb8ddec1a51a74b329d6104bce7cfe21da
font_01_sfnt_off0000e586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE586 10196 bytes
SHA-256: 13d6972598e1069b96b4fccb4ec63201ce52f9e2b0974e816be06ae4c7e86864