Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1658553c3583199…

MALICIOUS

PDF

70.9 KB Created: 2021-02-26 18:03:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c585b94fbb3a82332296dffd1bb614a1 SHA-1: f5902b6cfb682bf92fc67f26a3478e957a02fd15 SHA-256: a1658553c35831997dd04f3f76317b0459249bbd871b0808cb22349ef147a5a5
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jumiwimov.ru/wix?keyword=thank+you+letter+for+grant+funding PDF link annotation
    • http://svoylend.xyz/j24_spinnaker_sheet_lengtheuco3.pdfIn PDF document text
    • http://volosaty100.xyz/857712292724h3ih.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461485/normal_5fec4d07553da.pdfIn PDF document text
    • http://uspex22.online/gaximodifogavagevu6zzs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405179/normal_600353eea3c2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451018/normal_5fc5df8a14c49.pdfIn PDF document text
    • http://true-board1.club/52225700787mmvps.pdfIn PDF document text
    • http://italiabeach.space/water_displacement_worksheet_middle_schooleu5m2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391326/normal_601473224ecf0.pdfIn PDF document text
    • https://cdn.sqhk.co/xogodapap/cKshiic/spotify_sprint_retrospective.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494868/normal_6004bb777fb1a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414860/normal_600387be33558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371265/normal_602aefa3b2de6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495696/normal_5fcb1e7869629.pdfIn PDF document text
    • http://itravelgr.com/funcion_del_sistema_endocrino_y_sus_principales_glandulasbsg0t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463809/normal_5ffa4e99a2581.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_off0000db63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB63 5104 bytes
SHA-256: 808738656ff11a3812961242627ed6fdd760e363ab072fdeae311867a73d5592
font_01_sfnt_off0000ecc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC7 9936 bytes
SHA-256: 158b4cae3507bcae1e5afe5e6712c0be6aabdaa7f5c0f733b54d78dd03364630