Malicious PDF — malware analysis report

Static analysis result for SHA-256 2488d5798ab88964…

MALICIOUS

PDF

71.8 KB Created: 2021-03-08 14:37:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: cd834e1ae3ea9654e51b1003e300e006 SHA-1: 4d39bb33790c87456af3393e3c3ad5ab85781c69 SHA-256: 2488d5798ab88964763ca493a1ee530a8ad80dd34fb95c4665e50a71ae5d691f
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/wix?keyword=como+multiplicar+fracciones+con+diferente+denominador PDF link annotation
    • https://fixabugodorev.weebly.com/uploads/1/3/1/8/131856934/fofedotunofix_xevilefaker_kosikejafivori_ropon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460963/normal_6019109577c26.pdfIn PDF document text
    • https://belanuxaru.weebly.com/uploads/1/3/4/6/134670531/gidilewetepuwerure.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372721/normal_5fdff590803d8.pdfIn PDF document text
    • http://znakomstva18x.site/470036744499vy0l.pdfIn PDF document text
    • http://ueuniti.website/mepewakenesubudapadobiglhkak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413701/normal_5ffcbec40f085.pdfIn PDF document text
    • https://kisobodowawon.weebly.com/uploads/1/3/1/3/131384145/540139.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383149/normal_600878df4f3ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420222/normal_601fa0bf7bfeb.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/nisiwanolom/46097366635.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/fefixelalezozegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41ff58e0-54a6-4bdc-bcd6-29abb2ac9eea/what_is_the_best_value_oral_b_electric_toothbrush.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/cantarell_bold_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/120d2443-411f-490c-b1e5-eace1236166d/96479321601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eb4a8a0-32dc-4e8e-a8f4-7f8b8c63c09e/71389382887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa57f317-114e-4902-9f1f-08ec34615708/18633043195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0327c2c-e6ff-478b-8c00-7dcf10830753/24194872804.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/kia_cadenza_review_consumer_reports.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d7c5171-6e82-4b41-9e84-3c883ce37f54/61342897673.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/pijuvoxojetuwiresetup.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_off0000d9c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C5 5208 bytes
SHA-256: a92edb202988c5c3b3c2a4ed25b82656672ea1e65a38d8632793490dcdb15677
font_01_sfnt_off0000eb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB61 11112 bytes
SHA-256: 6e5e9ac98257bafa7bcd787a58c23a922213a64ae12d50c622a69de11b6bf827

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