Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e7b1338c75684f…

MALICIOUS

PDF

86.9 KB Created: 2021-03-21 07:13:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e68a09117f23587eafefceeba9d915bd SHA-1: d496c90d6ef8a05c1bcbbf5532bb18297b636e26 SHA-256: 46e7b1338c75684f839693a750eb376ab250a29e9323e3d2fbddc22ee5f346c7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one primary URL pointing to a suspicious domain. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/wix?keyword=jerome+clarke+x+reader+lemon
    • http://zisasisolawewal.22web.org/what_is_the_land_of_stories_the_wishing_spell_about.pdf
    • http://xefapase.iblogger.org/42054862660.pdf
    • http://jumovuv.22web.org/games_apk_mod.pdf
    • http://moxumepavigotuf.iblogger.org/character_education_worksheets_for_grade_1.pdf
    • http://sutobep.getenjoyment.net/36291826111.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bokofapig/gta_online_guide_ceo.pdf
    • https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_75364c9b2dba4d6084b2c63587b5df91.pdf?index=true
    • http://zirutabu.myartsonline.com/assistant_principal_letter_of_interest.pdf
    • http://tusazofeg.rf.gd/army_apft_score_chart_walk.pdf
    • http://sonazorapabame.epizy.com/23924525157.pdf
    • https://s3.amazonaws.com/belopudevuzuza/45366573031.pdf
    • http://muxolisakij.epizy.com/verbals_and_verbal_phrases_worksheets_with_answers.pdf
    • https://s3.amazonaws.com/wetowuzuxit/mufirisur.pdf
    • https://s3.amazonaws.com/davawina/simatuk.pdf
    • http://jikokajogov.rf.gd/26474171097.pdf
    • https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_d2a02793104a48e1a7cf91803394f795.pdf?index=true
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_67adccc306804603a223d83199dbf61d.pdf?index=true
    • http://pivirujifija.epizy.com/internship_report_presentation.pdf
    • https://s3.amazonaws.com/bagokiko/85620929973.pdf
    • https://s3.amazonaws.com/mudurixo/betting_on_the_bride_full_movie.pdf
    • http://todidetiped.onlinewebshop.net/estimating_square_and_cube_roots_worksheet.pdf
    • https://387a498e-9551-4239-9507-3183ba214552.filesusr.com/ugd/cd403b_4ed0e562a0f544f889ecfab5e45e0d26.pdf?index=true
    • https://s3.amazonaws.com/dakebesuvum/android_floating_action_button_pressed_color.pdf
    • http://bozopuzele.epizy.com/84344620906.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116bb.bin
b04aea987a5a29e44708400c5d8736e3d4870e180dd9a1eeccf1c3d4fd3c9e25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116BB 5028 bytes
font_01_sfnt_off000127c2.bin
cb9064d8f11a5f011de7a4178efe9653fdc8a8ac234c2c157b0f14598f7e386d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127C2 11300 bytes

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