Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b339a299a5c376…

MALICIOUS

PDF

78.4 KB Created: 2021-03-10 14:40:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ebfc2e42fefd762dcaa4a6ffa785066a SHA-1: 548bc1f8d857bbb25b4be0e0befa8d37b68d6ffb SHA-256: 88b339a299a5c376e9cb9145a9f10d24baff4a6b79f9fad304145c1d991b8b3e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF document contains embedded URLs and exhibits characteristics of a phishing lure, specifically mentioning "Canada visa apply form" and using callback phishing language. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous disposable domains and link farm heuristics further supports this assessment, suggesting the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://soxebez.ru/123?utm_term=canada+visa+apply+form PDF link annotation
    • http://momentshop.website/doxugoxaremeyjx5v.pdfIn PDF document text
    • http://kovamuwaropepu.getenjoyment.net/pipetedeti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502464/normal_602527cf8c292.pdfIn PDF document text
    • http://salonly.xyz/allahabad_university_form_2018uopt5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426545/normal_60388c09976f9.pdfIn PDF document text
    • http://netzamka.ru/pojatotg0cl.pdfIn PDF document text
    • http://reduslim-europa.site/hydraform_block_machine_for_saleg7rtb.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/tripura_rahasya_hindi.pdfIn PDF document text
    • http://nujagexurej.medianewsonline.com/hornady_reloading_data_223.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/sexiest_man_alive_2020_list.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/97490499446.pdfIn PDF document text
    • http://helpcontactform.com/rci_2950_dx_for_salee2e80.pdfIn PDF document text
    • http://itsamorem.com/jakafasemixb4z81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386336/normal_601aee9b65e43.pdfIn PDF document text
    • http://health2health.online/grad_school_application_essay_formatv1yz9.pdfIn PDF document text
    • http://worameruvejaka.mywebcommunity.org/85142097584.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497687/normal_5ff41acdddcab.pdfIn PDF document text
    • http://reetodo.online/destroyer_2018_parents_guidemavy5.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/amplificador_de_instrumentacion_ganancia.pdfIn PDF document text
    • http://scrlt.xyz/2559554383309bqb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dovunufesesiz.onlinewebshop.net/78065430001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7bc0335-9fe7-45b5-86ac-41748cdd9611/how_to_find_sound_driver.pdfIn PDF document text
    • http://zitulogakapede.myartsonline.com/the_secret_life_of_pets_2_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3593c142-791c-4faa-8acd-653d72ff8a22/88512285447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b4ef237-3a9b-4e8a-be50-1e22e8c47865/is_fl_studio_for_mac_free.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_off0000f410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF410 5252 bytes
SHA-256: 68775fac9ff6ca62baf1befd861069fbc712bf38b163d823124805637879ef77
font_01_sfnt_off000105ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EC 11192 bytes
SHA-256: 0a1f1d31b31a344c5619e3086344c631cab857ed047dfa63a148f6857e16756f