Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e822cea18043cdb…

MALICIOUS

PDF

78.0 KB Created: 2021-04-03 07:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d82d9dd002222b2a575633b3f33b3fd9 SHA-1: 2ebd6f3964476b4d0e9bb77e55af3c1be27928d5 SHA-256: 3e822cea18043cdb5b5ed1800c36b8ba07a48f6fbb48d8f14ffffd8bdf625f4b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://gimoguvi.ru/strik?utm_term=video+game+playstation+vr+bundle+worlds+oculos+vr+ps4 PDF link annotation
    • https://cdn.sqhk.co/nedupugifuka/PggFnic/field_hockey_coaching_jobs_near_me.pdfIn PDF document text
    • http://vedivux.mygamesonline.org/83720690908.pdfIn PDF document text
    • https://cdn.sqhk.co/kodivitedi/qxKhijd/90259150501.pdfIn PDF document text
    • https://cdn.sqhk.co/fofesali/qThIgeM/50003450176.pdfIn PDF document text
    • https://cdn.sqhk.co/bofogarabu/gyhbegj/the_teacher_granny_branny_mode.pdfIn PDF document text
    • https://cdn.sqhk.co/lojavowi/ihiev6V/free_employee_handbook_template_uk_2018.pdfIn PDF document text
    • http://nitapida.mywebcommunity.org/76510356105.pdfIn PDF document text
    • http://wanezus.scienceontheweb.net/tifotojujiwezuf.pdfIn PDF document text
    • https://cdn.sqhk.co/zunegajudune/qLifmif/wopazadujuruvudilen.pdfIn PDF document text
    • http://verifybadgehelp.com/9605637868pjcwt.pdfIn PDF document text
    • http://zemesod.getenjoyment.net/livumarukidibagumawana.pdfIn PDF document text
    • http://rorureferujuraf.22web.org/agama_islam_kelas_10.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/2if3bbU/11652151461.pdfIn PDF document text
    • http://daddytestit.xyz/25253461313dcrto.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/t4UjjEx/air_jordan_1_dior_raffle.pdfIn PDF document text
    • http://hookup671.site/what_is_the_average_size_of_a_standard_dachshund9xsqg.pdfIn PDF document text
    • http://openchambre.xyz/rujawuworijezadejatanelzezl.pdfIn PDF document text
    • http://nebemor.mywebcommunity.org/marcy_platinum_home_gym_price.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://supojig.rf.gd/reworinafudoxumesexiwuga.pdfIn PDF document text
    • http://sefowolo.atwebpages.com/98422517065.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/vexubasabolipumujesu.pdfIn PDF document text
    • http://laxufazekez.atwebpages.com/introduction_applied_linguistics.pdfIn PDF document text
    • http://jarewixefokoxem.epizy.com/44958389142.pdfIn PDF document text
    • http://funizenobuwuka.epizy.com/88377201934.pdfIn PDF document text
    • http://fewasav.rf.gd/breath_of_fire_3_strategy_guide.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_off0000f23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23C 5840 bytes
SHA-256: b89e7295b29c8853c30c05d5c2e5bc11547308719db44a7b524cd759dbcdaa54
font_01_sfnt_off00010628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10628 10440 bytes
SHA-256: 207a0be2e52ce71ea09756bda032d7ccb36ad9d55f0868b702052399a1ac6fce

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