Malicious PDF — malware analysis report

Static analysis result for SHA-256 508d47c37551fd4c…

MALICIOUS

PDF

80.0 KB Created: 2021-02-22 00:40:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0d6fbc123bc94b0d6084b8b88b70da49 SHA-1: b45f72406f89f4ca3fb3e1fc436056fa5eb26aa4 SHA-256: 508d47c37551fd4c5d5576d1508d3f1b45833ea4a4ba703ba1c827405fc21474
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/wb?keyword=read%20after%20we%20collided%20anna%20todd%20online%20free PDF link annotation
    • https://xebolefijepipol.weebly.com/uploads/1/3/0/7/130739937/43b0287765d66.pdfIn PDF document text
    • https://gapojusegora.weebly.com/uploads/1/3/1/4/131408170/xizegibiruzeli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427091/normal_601be4018a507.pdfIn PDF document text
    • https://toxofeleziwogiz.weebly.com/uploads/1/3/1/4/131406173/0339aec08.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484805/normal_5fdee643533b2.pdfIn PDF document text
    • http://bogavevi.22web.org/craftsman_12_inch_planer_blades.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413109/normal_60264d06d7f31.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/fasomusogapovi/4liker_1._0_version.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/67889089283.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/acc_aha_hypertension_guideline.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/happy_new_year_movie_song_pagalworld.pdfIn PDF document text
    • http://kewivifonawati.epizy.com/natalopow.pdfIn PDF document text
    • http://jefevuxivux.epizy.com/java_jvm_1._8_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/angry_birds_star_wars_game.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/flight_simulator_x_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/ctet_2019_online_registration_form.pdfIn PDF document text
    • http://nigepitabatutap.rf.gd/wisiravimiwelujoj.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/espresso_english_grammar.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_off0000fe0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0E 4936 bytes
SHA-256: a8fda293378b42d87395b5924a9c245f19b11ce780eea74ea8225bc77a763bf4
font_01_sfnt_off00010f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F04 10400 bytes
SHA-256: 500f9156bdcde3c49dec421beca0df0579c3307b2745c598aaf7774bf10a06be