Malicious PDF — malware analysis report

Static analysis result for SHA-256 5045b18d622a6c3d…

MALICIOUS

PDF

78.0 KB Created: 2021-03-22 18:44:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 653c66f93103b3069c4d7f9c277cc8d5 SHA-1: 40193423302802ccb1f4e75cd48b986df689cccc SHA-256: 5045b18d622a6c3d5ee8bed910253e05d532ce2a5baf709a9c9fcd85553b3990
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URLs, such as 'https://gimoguvi.ru/wix?keyword=solaredge+se7600a-us+manual', likely serve as lures to phishing or malware download sites. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/wix?keyword=solaredge+se7600a-us+manual PDF link annotation
    • http://streichpack.online/bose_companion_3_series_2_weightk7fh0.pdfIn PDF document text
    • http://thechambre.xyz/final_fantasy_xv_royal_edition_xbox_one_xsdup3.pdfIn PDF document text
    • http://lnstagramsupportingcenter.com/davupojivarls2.pdfIn PDF document text
    • http://rusherx.studio/ibiza_island_travel_guidec2zgy.pdfIn PDF document text
    • http://topplafond.xyz/bemanevavmxgzg.pdfIn PDF document text
    • http://sandiego-podcasts.com/vokepoxosovokojup9hq.pdfIn PDF document text
    • http://rijebipimaba.getenjoyment.net/action_research_in_education_book.pdfIn PDF document text
    • http://lulilafemavivog.mygamesonline.org/25425266773.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/bissell_proheat_advanced_carpet_cleaner_25a3w_manual.pdfIn PDF document text
    • http://maleev.online/457541762776v6id.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9ddd3305-60a3-419c-9f92-6cb33cc4e212/theta_healing_training_nz.pdfIn PDF document text
    • http://vidugozu.atwebpages.com/how_to_identify_informal_fallacies.pdfIn PDF document text
    • https://71da2aa5-51c3-4f2c-ab18-08bbbad20131.filesusr.com/ugd/d216cb_069a5f65ae564f47b3ed48f6d0340793.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/311c1aac-ce7e-45d6-8588-98a36943dfe9/in_what_order_should_i_read_the_warriors_series.pdfIn PDF document text
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_40e7953a37f744a18273eb66dd3217ad.pdf?index=trueIn PDF document text
    • https://b585a76b-fab5-4024-b0d2-f3ad95444197.filesusr.com/ugd/404203_612739952855406ab37e6b1c5f95ffbf.pdf?index=trueIn PDF document text
    • http://zitasixan.atwebpages.com/reglas_de_pronunciacion_de_verbos_regulares_en_ingles_d_t_id.pdfIn PDF document text
    • http://tuzuxutetug.atwebpages.com/maviwe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e65e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65E 5412 bytes
SHA-256: 562427b9bdec815e4254164745430888562edf490149a989016d18ccb88f09a7
font_01_sfnt_off0000f8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A4 10632 bytes
SHA-256: a0b18c6f31f4aae239865b5c4467b3cdf9c04c2afb76c4278a2eca7748f8651e
font_02_sfnt_off00011cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD0 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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