Malicious PDF — malware analysis report

Static analysis result for SHA-256 4418604968d5c2c9…

MALICIOUS

PDF

68.4 KB Created: 2021-03-07 14:40:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 7faa793ffcb14c113c7dfb08457c823b SHA-1: 4f14635899b1ab25d353730eb9fd09fa5c7f3f08 SHA-256: 4418604968d5c2c909c6ad00c49d6f0b793d3e9639f1dd5fd487b0bc83385a29
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, potentially as part of a phishing campaign or to download a second-stage payload.

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://midufefew.ru/wix?keyword=nulaxy+km18+plus+manual PDF link annotation
    • http://fajutixosisi.22web.org/black_panther_wallpaper_hd.pdfIn PDF document text
    • http://badgesverified.com/complete_biology_for_cambridge_secondary_1_workbook_answersanunu.pdfIn PDF document text
    • http://aycotoro5.xyz/autocad_2020_mac_product_key_777l1ve3le.pdfIn PDF document text
    • http://kinorio5.xyz/xurukubxwabi.pdfIn PDF document text
    • http://torchland.xyz/reglamento_de_transito_celaya_gtostx92.pdfIn PDF document text
    • https://cdn.sqhk.co/pelotuwew/Z7oS7hj/luke_bryan_drink_a_beer_song_meaning.pdfIn PDF document text
    • http://servempieza.site/sigatoxapowogtsr80.pdfIn PDF document text
    • http://zesegalos.scienceontheweb.net/dotowamosifemete.pdfIn PDF document text
    • http://prizinsta24.space/language_of_sales_real_estate_job_descriptionctf34.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvivemu/Athg8gd/best_collage_maker_for_instagram_stories.pdfIn PDF document text
    • http://instofficial.online/singer_401a_user_manualv6kpt.pdfIn PDF document text
    • http://euroshopmn.space/tubevazfvsd.pdfIn PDF document text
    • https://cdn.sqhk.co/papusabefo/hie2SOy/english_classical_music_mp3_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gikumud.epizy.com/79858282688.pdfIn PDF document text
    • http://nisetekotixob.myartsonline.com/weroxipobamolapoxojosexur.pdfIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/rujivovaketal.pdfIn PDF document text
    • http://dixabaxoji.epizy.com/eheim_everyday_fish_feeder_manual.pdfIn PDF document text
    • http://fixidil.atwebpages.com/tolep.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_off0000cf86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF86 5320 bytes
SHA-256: 105dc6b2627fcca1eaed0550207b00f09e8d548311381be7e43f0cde55400df8
font_01_sfnt_off0000e1a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A7 10400 bytes
SHA-256: a26b5245cb69fabc359c2e7b5467ad331a285f1963e86e208426d4fbd21e9541

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