Malicious PDF — malware analysis report

Static analysis result for SHA-256 5963475bcca43504…

MALICIOUS

PDF

74.6 KB Created: 2021-02-20 01:18:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4cf3ac390d7ed7e7687ca4c5449b216c SHA-1: b0d29ff11cae4968800b7204dfc6cdb720590114 SHA-256: 5963475bcca435040eb90f1b98bd8b3bf97ecf0e4512d05089311079d0d56150
244 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to disposable hosting or known malicious redirectors. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and numerous external links suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://crophysi.ru/123?utm_term=calories+in+a+dunkin+donuts+cold+brew In PDF document text
    • https://xasukibumit.weebly.com/uploads/1/3/4/7/134749231/e06a3.pdfIn PDF document text
    • https://cdn.sqhk.co/jekunesoru/hgcUzhh/sea_glider_paper_plane_instructions.pdfIn PDF document text
    • http://sweetygirl.club/paroviloratumambrgd9.pdfIn PDF document text
    • https://dagatofolake.weebly.com/uploads/1/3/0/8/130874029/vozupipeketegu_fejema_rolupex.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/hb7hahc/dragon_mania_legends_all_dragons.pdfIn PDF document text
    • http://vengriya.space/gb_whatsapp_update_2019_maywzngk.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/DheheQT/90616279983.pdfIn PDF document text
    • http://juilopkiretlo.ru/rowadazekugudexidaronoxif03l1.pdfIn PDF document text
    • http://nutristrike-shop.ru/rukifosopowimud16ot2.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/Zigjbij/word_shuffler_essay.pdfIn PDF document text
    • http://zuwazari.22web.org/bare_necessities_piano_sheet_music_musescore.pdfIn PDF document text
    • http://itdiscounts.info/purchase_order_confirmation_template3gsyt.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/Abhajfm/takitesixokow.pdfIn PDF document text
    • https://xosufovopoxom.weebly.com/uploads/1/3/5/2/135298930/vetozo.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/igegcHe/potbelly_sandwich_shop_printable_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/vitozogog/ahzgdje/lesekupepokabamesorap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tazefuwavubu.rf.gd/gndu_date_sheet_ba_3_sem.pdfIn PDF document text
    • http://rokejunikutigid.rf.gd/bevunedomifov.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_off0000e77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77B 5136 bytes
SHA-256: 541a6e976e7bbc6f8b337d5e31c0af02f4c6ae39a234dd9b1b343dd261d2d0b1
font_01_sfnt_off0000f90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90B 10616 bytes
SHA-256: af182d8f5c97bd3e78d36259df347911e01ca0d806e5e802d3f33654927e4994

Open this report in the interactive analyzer, or submit your own file for analysis.