Malicious PDF — malware analysis report

Static analysis result for SHA-256 eccb4a55ef75e881…

MALICIOUS

PDF

83.7 KB Created: 2021-02-27 20:28:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 065617d6aaa6ac0a373be9894b72294a SHA-1: 758b43d9dfb4980492efe4cb6e9b886ff8d2d849 SHA-256: eccb4a55ef75e881a0929e7408ac36590bc8ee186201d4bd591cea4b5db88373
134 Risk Score

Malware Insights

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

The file is a PDF that contains a lure for downloading a movie, indicated by the document body and the presence of external URIs. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing attack aiming to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/award?keyword=sherlock+holmes+movie+2011+download+in+hindi+300mb PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499285/normal_6026616cdd8cc.pdfIn PDF document text
    • https://cdn.sqhk.co/razotefo/aqjkWjh/world_war_ii_mod_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403274/normal_600f48dde2dea.pdfIn PDF document text
    • http://maretexojud.66ghz.com/graduation_invitation_templates_microsoft_word.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/ejePohe/top_10_hollywood_prison_escape_movies.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386593/normal_600d55832b823.pdfIn PDF document text
    • https://cdn.sqhk.co/tuledapozato/zHgigci/18271595236.pdfIn PDF document text
    • http://wisevesimo.22web.org/wobiboxetazow.pdfIn PDF document text
    • http://tojumuwuluso.iblogger.org/huanyang_vfd_manual_gt_series.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/ehd3hjz/75322374435.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/77026466360.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tedijafubivot.epizy.com/faponufezelupawixikari.pdfIn PDF document text
    • http://fedununa.epizy.com/clinical_case_reports_journals.pdfIn PDF document text
    • http://retudazugo.rf.gd/1639798259.pdfIn PDF document text
    • http://lugopupi.rf.gd/6443704809.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/55063529653.pdfIn PDF document text
    • http://vemesedesalo.rf.gd/82641207323.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/ca_dmv_handicap_renewal_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/every_living_thing_is_made_up_of_mostly.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0D 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off0000fff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF2 6128 bytes
SHA-256: 9c1afcc040919b65472e8333bc7f180b2af7d653b8819d934d9259fcc4764783
font_02_sfnt_off000114a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A6 1704 bytes
SHA-256: aa54cde9e36263ecadc91b349dc61f8e54c629802f094d33dff838cbca496332
font_03_sfnt_off00011d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D27 10212 bytes
SHA-256: 7a161e24813ab0b5544c474b4e367180793d0ff8bde712c98ee50bfeae450864

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