Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9116aa2c85862b3…

MALICIOUS

PDF

89.0 KB Created: 2021-03-03 14:22:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: acc103f98ac134776cc0daa262cdc496 SHA-1: b7ffb21e33e10339d257e13626146b80aac33429 SHA-256: b9116aa2c85862b38f9288ba3d96c3318e82cd704d5198a61468637b9aba1981
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://leonvi.ru/award?keyword=chapter+8+chemistry+assessment+answers PDF link annotation
    • https://rewumakabaw.weebly.com/uploads/1/3/4/8/134856880/4844456.pdfIn PDF document text
    • http://mif-smeh.space/how_much_does_medical_laboratory_technologist_makem6oz7.pdfIn PDF document text
    • http://vodoroding.info/dino_run_chrome_gamefqy91.pdfIn PDF document text
    • http://all-system7.work/gaming_austria_guidepiub3.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/x1_dvr_box_dimensions.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/1914384626.pdfIn PDF document text
    • https://fodivavix.weebly.com/uploads/1/3/1/4/131483454/lagugisemoweragafuzu.pdfIn PDF document text
    • http://rowaxamapitowej.getenjoyment.net/33310844895.pdfIn PDF document text
    • http://pusewuvi.medianewsonline.com/my_cloud_desktop_app_wdc.pdfIn PDF document text
    • https://liwotagavujid.weebly.com/uploads/1/3/5/9/135961529/baeec.pdfIn PDF document text
    • http://palitra-cveta.ru/823551976210j0pk.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/tfal_deep_fryer_recipes.pdfIn PDF document text
    • http://kekijojovif.sportsontheweb.net/35260635561.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/sewamos/63092730683.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/ruduzapudab.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_off00011b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B75 5432 bytes
SHA-256: de3a543b365bce1f4eb3d7b83d433df4d8e6ff35868867bbd4fcbac9461091ea
font_01_sfnt_off00012dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD5 12372 bytes
SHA-256: b135ae42a984b38ea847f69a3ed37d2d1670efaa50e1af77f185a423a4805e67