Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6ecb1704af682c…

MALICIOUS

PDF

71.4 KB Created: 2021-03-04 07:18:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cd00a0821f88a77a6264d19fe0700973 SHA-1: 79e14666c2ad8e8b241f2cc79a95644cf9786b14 SHA-256: 8e6ecb1704af682c2764f8b83d055daed86762d4704841a540c5d5fed2d07025
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external websites, including suspicious domains like golowaki.ru and usacreditcheck.info. The embedded URLs and the heuristic firing for PDF_SEO_DISPOSABLE_LINK_FARM suggest a phishing or scamming operation designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://golowaki.ru/wix?keyword=discord+unbelievaboat+commands PDF link annotation
    • http://usacreditcheck.info/pejelibokebawodejkmxvo.pdfIn PDF document text
    • http://mopexaxurip.getenjoyment.net/98814068004.pdfIn PDF document text
    • http://salea.site/monster_hunter_world_review_youtubeiqwsm.pdfIn PDF document text
    • http://geniusenglish.space/queen_size_bed_sheet_dimensions_australialzms0.pdfIn PDF document text
    • https://cdn.sqhk.co/logubaxe/NYhcSgh/40622605806.pdfIn PDF document text
    • http://onatural.space/piwuzidizihc7nr.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/teutonic_religion_kveldulf_gundarsson.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/95460714927.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/15144259065nwvet.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/B1idSCe/waxininexevuvukunufosowe.pdfIn PDF document text
    • http://zagejudivavi.sportsontheweb.net/master_of_orion_3_best_race.pdfIn PDF document text
    • http://mujabelor.mywebcommunity.org/death_note_live_action_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/konumapedowe/vhjZigB/cute_fruit_wallpaper_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/widafopaj/hjaDhgL/drop_dead_gorgeous_meaning_in_telugu.pdfIn PDF document text
    • http://zavarivaemvmeste.ru/51805317024o831w.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/michel_foucault_history_of_sexuality_vol_1.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/55231261969.pdfIn PDF document text
    • http://kumululurug.scienceontheweb.net/what_are_four_types_of_persuasive_claims.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wugujub.onlinewebshop.net/software_testing_tools_free_download_windows_7_32_bit.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/luweladofijemu.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/92738218522.pdfIn PDF document text
    • http://vumamuv.myartsonline.com/what_is_doubt_a_parable_about.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_off0000d9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AD 5284 bytes
SHA-256: fb6d4eea046fe3510daae4d89c0c13d665d19c312be63c0143fcd568c49f7e8c
font_01_sfnt_off0000eb95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB95 10816 bytes
SHA-256: f1ad07c3b3e3bd464bd47ac9ddbae915aa5a1d31dec33474a835da3ee5f4dda3

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