Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab36a2cf876ce05…

MALICIOUS

PDF

83.1 KB Created: 2021-04-30 15:40:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9120126dfbdfa1c59d3fc30d9f5cc846 SHA-1: dab252e15b03d0dfcbd3df8c5f8b4ef8c88106da SHA-256: eab36a2cf876ce059b6422c22a3ae7e93487f28e044b2d3c995b3e43b6a0cd53
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://maypoin.ru/strik?utm_term=what+is+the+operation+in+afghanistan+called+now PDF link annotation
    • http://motubudasuvapan.medianewsonline.com/bacterias_gram_negativas_enfermedades.pdfIn PDF document text
    • http://zujirekirel.22web.org/akbarnama_in_english_free.pdfIn PDF document text
    • http://jomikifu.medianewsonline.com/lekegewujikukiv.pdfIn PDF document text
    • http://rowefuzoj.mygamesonline.org/problems_of_banking_sector_in_bangladesh.pdfIn PDF document text
    • http://xisajole.iblogger.org/que_es_la_demanda_en_derecho_procesal_civil_mexicano.pdfIn PDF document text
    • http://tareworig.mywebcommunity.org/convert_to_jpg_online_below_100_kb.pdfIn PDF document text
    • http://pebunoguge.mygamesonline.org/fomavesa.pdfIn PDF document text
    • http://tomokatixo.mygamesonline.org/axis_bank_blue_chip_fund.pdfIn PDF document text
    • http://serovakarara.mygamesonline.org/panagufakiriwem.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
    • https://s3.amazonaws.com/sonutopexaramuf/zolepagexamokagaru.pdfIn PDF document text
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_3586138852aa4dc09ca1ca73d8d0bfdd.pdf?index=trueIn PDF document text
    • https://7a3463bf-3117-47cc-940f-ad9d50d05675.filesusr.com/ugd/9f2514_ed00ae4cffa949158f6c862e6c1afe04.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/senodiw/51031822652.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/cash_book_template_printable.pdfIn PDF document text
    • http://wagimesitip.epizy.com/msa_breathing_apparatus.pdfIn PDF document text
    • http://ligoroxenafof.atwebpages.com/guitar_tabs_lick_it_up_kiss.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/bremerton_wa_zip_code_naval_base.pdfIn PDF document text
    • https://e3c65705-3664-417e-97b1-2ac29bfab8bd.filesusr.com/ugd/6a5da5_3da3646e0f9047459ec1cdc9ee8caccf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/rajokejatumugakexo.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/riwatiwowelepezejivuputu.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/jovazodolizevowukadipime.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/sp_303_vinyl_sim_ableton.pdfIn PDF document text
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_192bf669ce3c409cacb13bfbc38a422c.pdf?index=trueIn PDF document text
    • https://679cd94f-bb1f-411a-9684-d99498fe93d6.filesusr.com/ugd/ce16d4_2e0880fd4bc8408895afbdc4e4024124.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/how_to_draw_an_interior_design_layout.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_off0000f5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AA 5308 bytes
SHA-256: 040b10823100d7d5c4ccc02bda6923641a1c72b2e664108af68c0feeb6ba7eea
font_01_sfnt_off000107c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C9 11236 bytes
SHA-256: 602a038d527999bb21a3081ca5371859aab5cfbc245fae497d3b8bbdac6959c7
font_02_sfnt_off00012e0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E0B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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