Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b1f47a691b597dc…

MALICIOUS

PDF

65.9 KB Created: 2021-02-16 06:14:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1af355c5f4c55885f6ffa246c8596f87 SHA-1: 1cfcb7eb87f0219a38508492cdb81d821fd2402d SHA-256: 3b1f47a691b597dc6944d7271e559c53c40414e1344338991c8dd8c9fd3dde95
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://jacksth.ru/wb?keyword=back%20to%20eden%20herbal%20book PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408197/normal_600f05091a273.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408584/normal_5fcc0936842d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424646/normal_5ff1ed15cada1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412380/normal_6003c1097d990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480594/normal_5fe9de0b3e2f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406812/normal_60258db1b05c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417329/normal_6018f1997bdb5.pdfIn PDF document text
    • https://dodezugufiz.weebly.com/uploads/1/3/5/3/135331092/24ef95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462368/normal_600aa3793d82b.pdfIn PDF document text
    • http://xuzejomuxide.22web.org/careem_car_app_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380692/normal_5ff7a64977b08.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/purixifusipelid/chi_ionic_hair_color_review.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/lamborghini_lyrics_pagalworld.pdfIn PDF document text
    • http://kesufelitam.rf.gd/frasi_analisi_periodo.pdfIn PDF document text
    • http://redebalumu.rf.gd/11061034615.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_off0000c645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC645 5104 bytes
SHA-256: 344c307f4b7a5031a4d4f1866fc1360b32e1b1fdbc12c2e69be200057205f757
font_01_sfnt_off0000d796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD796 10288 bytes
SHA-256: 906438a2f2a8d2998fcf6e1f94f143fb75d84c3eb3a46afc0776ceb96e5e15e6