Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3ec5d0665951150…

MALICIOUS

PDF

81.8 KB Created: 2021-04-10 08:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60932e89223afc7461b69e29b6313cca SHA-1: 988e19be908c086246ce9c8d947db2a8ea2bf0aa SHA-256: e3ec5d0665951150bdeaf155a274884f5f1f9d8addc061a45aff1b8b8cd6a978
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains a large number of external links, suggesting a link farm or redirection mechanism to malicious sites. The embedded URLs and the PDF structure strongly indicate an attempt to direct users to potentially harmful content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=does+punctuation+go+inside+quotation+marks+uk
    • https://cdn.sqhk.co/pisapaxosabo/kheX3ic/red_lobster_near_me_reservations.pdf
    • https://cdn.sqhk.co/gorokipo/j9Hiiah/space_racing_2_mod_apk_revdl.pdf
    • http://theandyhong.com/yamla_pagla_deewana_2_video_songjli9v.pdf
    • http://tokio-2020.fun/wosomop93f81.pdf
    • https://cdn.sqhk.co/rawerusiwala/fHHghXp/galaxy_watch_3_vs_galaxy_watch_specs.pdf
    • https://cdn.sqhk.co/podogule/bidiejg/jadogiri.pdf
    • https://cdn.sqhk.co/depivuni/fiaahdA/sas_zombie_assault_4_wiki.pdf
    • https://cdn.sqhk.co/zofonabiz/jahijaU/tokaido_game_review.pdf
    • https://cdn.sqhk.co/nixafusoda/jhrZjje/cara_parkour_di_pubg_mobile.pdf
    • https://cdn.sqhk.co/xeposetuge/YgMksbC/37657866310.pdf
    • http://bigmagazin.xyz/dewawugelz1w4a.pdf
    • http://xitnet.fun/rekisodebokefda60.pdf
    • http://ruszaimclub.ru/931936486945mqzn.pdf
    • http://abistrans.ru/55857907577m1h93.pdf
    • http://italystore.pro/nurabodugajikorilosofarok5knq7.pdf
    • http://boost-store.net/todos_los_tipos_de_sistemas_operativos_que_haybqcmi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://junusesofuxog.rf.gd/how_to_show_nationalism_and_patriotism_at_home.pdf
    • http://degejukifukux.epizy.com/mikukidememunatijajo.pdf
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_b6e6512c251c40c681861ef99a14aba3.pdf?index=true
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_f861ccefe8ba4c808de851341b1b168d.pdf?index=true
    • https://5053e88e-9e18-4719-890c-32a1cca0295d.filesusr.com/ugd/411503_49d9e6dafa494fe0a7b7fb107deeaaac.pdf?index=true
    • https://af8e4364-7f8a-45ec-af3e-d69da1c27fbb.filesusr.com/ugd/12c36c_43a9871a961e44ad83659322c0c7f2a9.pdf?index=true
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_8f10f6d0a36841cbb6796ec82fa460fb.pdf?index=true
    • http://lozepis.epizy.com/is_blink_a_good_buy.pdf
    • http://dupolizeza.epizy.com/blank_gift_certificates_templates.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff74.bin
b1db23b22588c948c9de20e95558b9554c757faa9fa97f53fd6b624a0a11207c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF74 5552 bytes
font_01_sfnt_off00011240.bin
d818b6882ec8d6cdc3e2498af494665eb5f684be9758e357413ae38b24a36f51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11240 11008 bytes

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