Malicious PDF — malware analysis report

Static analysis result for SHA-256 677c71a975cccb1c…

MALICIOUS

PDF

68.4 KB Created: 2021-03-22 08:30:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: eebad830a8cc4d63cd0b8d6c44add7ba SHA-1: d382b931e5c9d8a149496e335bc81f377adcb0aa SHA-256: 677c71a975cccb1cd83da14de62edf93ed297494c883f3184ba5a48dadfd0cee
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains embedded URLs that lead to link farms and potentially malicious content, suggesting it's designed to redirect users to harmful websites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a tactic to obscure the true destination by using numerous disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=cy+fair+isd+baseball+schedule PDF link annotation
    • http://davebamonuzove.medianewsonline.com/mapa_turistico_antequera.pdfIn PDF document text
    • http://woronari.getenjoyment.net/can_you_cook_a_ham_in_a_reynolds_oven_bag.pdfIn PDF document text
    • http://fexevewuli.mypressonline.com/kindle_paperwhite_battery_replacement_service.pdfIn PDF document text
    • http://vasizazesunof.medianewsonline.com/relative_dating_worksheet_answers.pdfIn PDF document text
    • http://wegoradubi.sportsontheweb.net/fiser_absite_question_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388181/normal_5ff30bd5e2789.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428329/normal_5fd39bff26e36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403283/normal_604ccb6a93ceb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425514/normal_6053664b8ab3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486537/normal_603485ac1f8fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371806/normal_602429b5b4d3e.pdfIn PDF document text
    • http://wubujonil.getenjoyment.net/flushmate_503_not_flushing.pdfIn PDF document text
    • http://didazema.mypressonline.com/what_is_a_landscape_social_studies_work.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445892/normal_602714556e88a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://liruselewaviba.rf.gd/where_did_the_revenant_true_story_take_place.pdfIn PDF document text
    • http://dopovis.myartsonline.com/31085822776.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/how_to_connect_petsafe_wireless_collar.pdfIn PDF document text
    • http://moxixezegosa.onlinewebshop.net/urticaria_causas.pdfIn PDF document text
    • http://rukukuwozar.epizy.com/nebuwilur.pdfIn PDF document text
    • http://felapoliriwid.rf.gd/how_to_stop_undelivered_mail_returned_to_sender.pdfIn PDF document text
    • http://dudajulasur.epizy.com/iosh_risk_assessment_form_filled.pdfIn PDF document text
    • http://mogikujerezegu.epizy.com/64645770119.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_off0000cda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA2 5256 bytes
SHA-256: 416c47716a377daf73ac6ea219f6ade0588379678ef436b69fe19945c1fa3174
font_01_sfnt_off0000df7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7E 10684 bytes
SHA-256: dd8c994c8fe45b9c8cb4777e7f1f39d949c4c757e2f663f656331bd3844b1b24

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