Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a8e64c371bdc2d1…

MALICIOUS

PDF

74.9 KB Created: 2021-05-09 11:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 42dd2fc83c4ad06ed356421318847582 SHA-1: 4046707ac09ecf83cd09be28021286113065483a SHA-256: 0a8e64c371bdc2d1f0de4037a8585ca99c60e2b307cf8d4fd64bb24dd13bf7d9
134 Risk Score
Tags
free-cdn-ebook-manual-lure

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/strik?utm_term=how+to+install+ematic+digital+converter+box PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403683/normal_5ffa7d8c30206.pdfIn PDF document text
    • https://kosafozusatav.weebly.com/uploads/1/3/4/3/134308791/nekosugazokutov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465694/normal_604ecc0680e9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377120/normal_6018412504d50.pdfIn PDF document text
    • https://renudufodajofi.weebly.com/uploads/1/3/4/8/134884992/kuzajonugazepoxotod.pdfIn PDF document text
    • http://jobepam.iblogger.org/viper_remote_start_system_cost.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/i7idhcG/zunupik.pdfIn PDF document text
    • https://jofevuwob.weebly.com/uploads/1/3/4/2/134235005/1589407.pdfIn PDF document text
    • https://cdn.sqhk.co/kalusoxat/hhJjiLp/notezip.pdfIn PDF document text
    • https://cdn.sqhk.co/bomoxale/j8ejdhh/pokemon_sword_and_shield_dlc_pokemon_list_serebii.pdfIn PDF document text
    • http://vabaxowerad.iblogger.org/xesibo.pdfIn PDF document text
    • http://mupokufakub.iblogger.org/physical_science_grade_11_book.pdfIn PDF document text
    • http://podenepusow.22web.org/5191882576.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462345/normal_5ffe84410f049.pdfIn PDF document text
    • https://javezevefumutew.weebly.com/uploads/1/3/2/7/132740470/wanizulodowevakuvefu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405929/normal_5fe40d7923539.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://taruxapajosavup.epizy.com/dotavapi.pdfIn PDF document text
    • http://vonanovab.epizy.com/kumubadofinupezem.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/vizepodibavomovetotoxag.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/how_to_install_transmission_shift_solenoid.pdfIn PDF document text
    • http://vodulaxezapudez.epizy.com/cambridge_english_proficiency_writing.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/nutafusezizavirolomaju.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/vavopomujesawozidojadase.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_off0000e4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D3 5580 bytes
SHA-256: ed323a9bcf332d72f1670473ae5342523ea98d6e010f7a0637265c831bc6418c
font_01_sfnt_off0000f7cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CD 11120 bytes
SHA-256: 57ae33ecf837d936b6e017b9354cddad306a89eef09cb0d63eced09129da100d

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