Malicious PDF — malware analysis report

Static analysis result for SHA-256 be253418c46c436c…

MALICIOUS

PDF

69.8 KB Created: 2021-02-13 09:11:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1af449beb11fe7aaf45290a2a71e6a55 SHA-1: 0cf009a1b8f30b0ea7f05d0ad32917ca8cf26f51 SHA-256: be253418c46c436ca7aa38b9dba1167c42566662592cd516a9f3e889ed1ac72f
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/aws?utm_term=sea+animals+worksheets+kindergarten PDF link annotation
    • http://pixelbarista.com/zetuxulagiputufekupi8y8mc.pdfIn PDF document text
    • http://giocodigital.website/ready_player_one_online_free_downloadcszg1.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/SYyBdik/zutowokifozu.pdfIn PDF document text
    • https://danudaxeki.weebly.com/uploads/1/3/5/2/135297903/746353b55.pdfIn PDF document text
    • http://wordsideget.top/humanity_bureau_imdb_parents_guide08g1p.pdfIn PDF document text
    • https://nawobelif.weebly.com/uploads/1/3/5/3/135307193/tesuvabidazufenasis.pdfIn PDF document text
    • https://pixipemojawipe.weebly.com/uploads/1/3/4/4/134459682/xebul-xutagubelunijo-wisujej.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/xarojapi/lejowujedizexak.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/vaaste_song_mr_jatt_pagalworld.pdfIn PDF document text
    • http://zakefozufasedi.epizy.com/jijomowexibesate.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/34874800074.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/best_website_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/english_courses_in_auc_free.pdfIn PDF document text
    • http://xojakejib.epizy.com/molewegipisasop.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/preschool_counting_worksheets_1-_20.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_off0000d36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36F 5500 bytes
SHA-256: 972bb9f2a74562019bbd92a467d5068f28cd8303ecddb48dacd039e6f1ad77aa
font_01_sfnt_off0000e602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE602 10700 bytes
SHA-256: fb5c8f22329a3b74ac79d7e5b9f7e5770c7e0b096020c2205dec9cbdf3f1d8c0