Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecb6c2d04bf4570d…

MALICIOUS

PDF

78.7 KB Created: 2021-03-22 03:04:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b562f6b8df213c62d6cccee265be7407 SHA-1: 3f31f5ece55932507e5360ff702750dcb3438f54 SHA-256: ecb6c2d04bf4570d357d96061026589813201860a727603a41b7a61d7fb26b3f
184 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to known malicious redirectors or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 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://yafferge.ru/strik?utm_term=does+xbox+one+controller+recharge+batteries In PDF document text
    • http://healthytrands.com/algebra_and_trigonometry_textbookwf2u2.pdfIn PDF document text
    • https://misiwutikamiba.weebly.com/uploads/1/3/4/6/134601431/5377162.pdfIn PDF document text
    • http://japancar-sib.ru/nuzogavoloxonozilibor1s0xq.pdfIn PDF document text
    • http://getepitisux.mywebcommunity.org/mastering_the_rockefeller_habits_verne_harnish.pdfIn PDF document text
    • https://foselilozodolu.weebly.com/uploads/1/3/4/7/134732264/3139772.pdfIn PDF document text
    • http://xtrading.buzz/high_speed_chase_las_vegas_right_nowkl9yh.pdfIn PDF document text
    • http://xagakojitogiva.getenjoyment.net/wisconsin_card_sorting_test_espaol.pdfIn PDF document text
    • https://jumolemema.weebly.com/uploads/1/3/4/8/134853288/gapotobefukun-malideda-muwive.pdfIn PDF document text
    • http://politach.com/wijekl8guw.pdfIn PDF document text
    • http://jakiduve.scienceontheweb.net/adobe_acrobat_pro_2020_convert_to_word.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426262/normal_603b001bb1227.pdfIn PDF document text
    • http://aicberg.net/arachnid_galaxy_top_gun_challenge_dart_board_parts37h3n.pdfIn PDF document text
    • http://best-store.club/fobefuzeteruralaxutujezekcfxv0.pdfIn PDF document text
    • http://jepisafidezegun.scienceontheweb.net/kvs_biodata_form_for_interview_tgt.pdfIn PDF document text
    • https://jinabotulopel.weebly.com/uploads/1/3/4/6/134602701/kewivoledelizu.pdfIn PDF document text
    • https://fapezadedafax.weebly.com/uploads/1/3/4/6/134609176/57492695537.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483586/normal_603b0af1c2034.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wefulipov.epizy.com/homelite_blower_service_manual.pdfIn PDF document text
    • http://mifedisiso.atwebpages.com/zitewibiwobebop.pdfIn PDF document text
    • http://jatosug.rf.gd/amadeus_project_apk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DF 5056 bytes
SHA-256: be03664146037bc3a3187791f2d2272ffbc3a86757cfb60b53c2affcdb86d5ae
font_01_sfnt_off0000f901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF901 11324 bytes
SHA-256: 70fe3bf80998772981cc45661072ad286691e5951118b3d9eb653d5171ac2f83
font_02_sfnt_off00011f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F49 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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