Malicious PDF — malware analysis report

Static analysis result for SHA-256 06011123c10bb35d…

MALICIOUS

PDF

89.5 KB Created: 2021-03-25 00:08:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 52873337ef1074873badb9a9db882553 SHA-1: 5bf1efbcd5b62d1acbca7e1532bda1dd0e030655 SHA-256: 06011123c10bb35d1a055aa64fb16af1c2c8e4bdcbe5251caad9378e6cae39d0
186 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 0.9992

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 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.
  • 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.
  • 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://resalured.ru/strik?utm_term=is+aws+difficult+to+learn PDF link annotation
    • http://losqutoq.online/computer_security_principles_and_practice_4th_edition_solutions_freevc8bm.pdfIn PDF document text
    • https://vowebaxuzifov.weebly.com/uploads/1/3/0/7/130738870/5599653.pdfIn PDF document text
    • http://goods-amzon.com/king_of_thorns_book_summary44qg9.pdfIn PDF document text
    • https://jetezoxow.weebly.com/uploads/1/3/1/3/131379231/dazopewe_xowunepupag.pdfIn PDF document text
    • https://mufuwavujove.weebly.com/uploads/1/3/4/0/134042856/445253.pdfIn PDF document text
    • http://instapodarok365.site/tiger_scout_bookb2cr4.pdfIn PDF document text
    • https://sunivisoxeban.weebly.com/uploads/1/3/4/4/134493344/vobiwobotibotoxora.pdfIn PDF document text
    • http://aicberg.net/gibudekororubura6jyf.pdfIn PDF document text
    • https://kiwitelovig.weebly.com/uploads/1/3/4/3/134358902/vapalelugogesovuw.pdfIn PDF document text
    • http://esclub.pro/xigavajoxuserajoxumf0nja.pdfIn PDF document text
    • https://lupipoga.weebly.com/uploads/1/3/4/4/134402738/bedumudesedesa-golipuvuwup.pdfIn PDF document text
    • https://kobokudebixisog.weebly.com/uploads/1/3/5/3/135390699/pusuzorokazenulimofu.pdfIn PDF document text
    • http://gikadoketu.iblogger.org/cosmote_tv_go_player_windows_7.pdfIn PDF document text
    • https://fadegedisumobe.weebly.com/uploads/1/3/5/9/135992854/3165dea929f.pdfIn PDF document text
    • https://zovipimisog.weebly.com/uploads/1/3/1/1/131163747/1881023.pdfIn PDF document text
    • https://zomatofaso.weebly.com/uploads/1/3/4/6/134633851/zodofa_jobudena_tazorijod_texorukagifa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://titeviwexesu.rf.gd/61133260285.pdfIn PDF document text
    • http://ravezipago.epizy.com/28153030705.pdfIn PDF document text
    • http://vimedunofonuw.rf.gd/anexos_simples_nacional_2019.pdfIn PDF document text
    • http://wejegekobo.rf.gd/wifoxitoxif.pdfIn PDF document text
    • http://xapimiwosusuv.epizy.com/excel_bedingte_formatierung_andere_zelle_farbig.pdfIn PDF document text
    • http://tezezufiru.rf.gd/27228921325.pdfIn PDF document text
    • https://9e7b01ce-91ce-414a-93c5-ade8df4b7359.filesusr.com/ugd/cfbfd2_3771630f4ba147babc87371daa921127.pdf?index=trueIn PDF document text
    • https://4647adb0-9c01-46a1-aef1-4380d5873f13.filesusr.com/ugd/edb4a7_36296a1dbf9a42508bba0b72ac12467b.pdf?index=trueIn 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_off000120e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E6 5044 bytes
SHA-256: ede3b6707f9e8bc05dc1fb4352af0e051f82270a2c53de2c6c4b3817f5403e80
font_01_sfnt_off00013236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13236 11604 bytes
SHA-256: efdf64f0ad7e4fec2c56bc48349acd17058dda3076dc2cc4584c53cec5aa25eb