Malicious PDF — malware analysis report

Static analysis result for SHA-256 588d5c8ca27070fa…

MALICIOUS

PDF

86.7 KB Created: 2021-03-16 03:01:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: f1d6cd790edd063001bfa329a6130953 SHA-1: f7009ae8effc168b5c5ef53bd3a4c2f9f40a298d SHA-256: 588d5c8ca27070fa42a32643717fdd3c5e4311e6a91b4e199fdae21ca5655d07
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with several pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates the document is designed to host many links on potentially untrustworthy domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=cosco+pack+n+play+changing+table+attachment PDF link annotation
    • https://cdn.sqhk.co/lomuwomigez/eZMADie/knights_templar_masonic_sword.pdfIn PDF document text
    • https://cdn.sqhk.co/vevigagexoxa/jjbplgd/19300164329.pdfIn PDF document text
    • http://xteenware.online/polixadatirodusizosusivihwfpz.pdfIn PDF document text
    • https://cdn.sqhk.co/gixegusu/iifkLgf/block_story_seeds.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/watch_hunger_games_mockingjay_part_2_online_free.pdfIn PDF document text
    • http://zatutajijiti.getenjoyment.net/what_is_in_the_new_sims_4_update_november_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/rirelolut/jaghhgo/bloody_bastard_meaning_in_kannada.pdfIn PDF document text
    • https://cdn.sqhk.co/wipedekis/VDKhbFl/68739910946.pdfIn PDF document text
    • http://grizhoff.ru/xexusowazapemuduzd1wng.pdfIn PDF document text
    • http://wiinorama.space/what_is_the_magna_carta_us_historyc8mvr.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/shield_of_ages_gibbed_code2nl4b.pdfIn PDF document text
    • http://legko.travel/precalculus_with_limits_a_graphing_approach_third_edition_answers6zl2h.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/c0Chc0u/23063974459.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/bakabutofozososavuxe.pdfIn PDF document text
    • http://wafogaz.rf.gd/economics_circular_flow_diagram_template.pdfIn PDF document text
    • http://juxawewoguseku.epizy.com/70102368122.pdfIn PDF document text
    • http://tavupikegoseri.epizy.com/form_arcosanti_2016.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_off0001141b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141B 5464 bytes
SHA-256: cee23af91e42105eed704b816904b349c6dc54de02d354f7fc08526d2ee527f1
font_01_sfnt_off00012699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12699 10900 bytes
SHA-256: 0aed6458ca1fcdefbf3882c7a45e1e9d921b614a6ca786048b0c0b731068eacf

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