Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e426ce75ac5335d…

MALICIOUS

PDF

85.0 KB Created: 2021-04-06 03:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98b80aa7ddbaa80720e824a7cfd5fc2e SHA-1: 91300dbfea7b9d8aa6af56ca208a66fb05045996 SHA-256: 6e426ce75ac5335d4883652a4ac78f81934ab83224cfd3a31cfc1237350deeca
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are part of a link farm designed to artificially boost search engine rankings. One prominent URL, 'https://xezojetit.ru/wix?keyword=minecraft+medieval+mansion+schematic', is presented as a lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution via the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://xezojetit.ru/wix?keyword=minecraft+medieval+mansion+schematic
    • https://joponavo.weebly.com/uploads/1/3/4/2/134234964/fepazak.pdf
    • http://qlemelest.online/pc_games_download_free_windows_7_city_racinga9wwh.pdf
    • https://vegujuzemev.weebly.com/uploads/1/3/4/0/134017506/gexixanawurilirudamu.pdf
    • http://coupons2020.info/risexozarafefalabumash9m.pdf
    • https://cdn.sqhk.co/kubepugemaki/ihfggid/19999250681.pdf
    • https://cdn.sqhk.co/gixixutiji/dgjiugh/create_project_timeline_online_free.pdf
    • https://cdn.sqhk.co/wamefuvew/TC0ZOic/youtube_praise_and_worship_gospel_songs_with_lyrics.pdf
    • https://durajonuz.weebly.com/uploads/1/3/1/3/131383269/9351902.pdf
    • https://zamamuxito.weebly.com/uploads/1/3/4/2/134234866/91e546d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kavalukato/62663252750.pdf
    • https://c4647614-9ff8-4b00-b819-08dc938bd166.filesusr.com/ugd/5d3f24_59467666322d4a759058328a1ef13c1a.pdf?index=true
    • https://s3.amazonaws.com/likerajatob/fundamentals_of_engineering_thermodynamics_9th_edition_tables.pdf
    • https://s3.amazonaws.com/tinezedu/mileage_expenses_claim_form_template_uk.pdf
    • https://d4e73f68-9870-4c81-be0c-0a6dd7607cd2.filesusr.com/ugd/6f53d7_abef0315825e493c95870b7be8756c64.pdf?index=true
    • https://s3.amazonaws.com/mejobu/69990133709.pdf
    • https://s3.amazonaws.com/bokelur/zamapodupivetix.pdf
    • https://s3.amazonaws.com/kotodur/naruto_shippuden_ninja_storm_4_apk.pdf
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_d640f7d6602d4f78bb195a442fef3819.pdf?index=true
    • https://s3.amazonaws.com/magapeguwabe/auto_clicker_apk_latest_version.pdf
    • https://69df74eb-9f83-488d-97bb-abb55063df61.filesusr.com/ugd/f34323_8f1f0df33d8e45088ec00f81310ff909.pdf?index=true
    • https://a43ab9c2-5efb-4cee-ac06-b782a0f5e207.filesusr.com/ugd/4826f5_9732a11c82104b1a9e4476edd82e293d.pdf?index=true
    • https://s3.amazonaws.com/wizidimawag/dural_arteriovenous_malformation_wiki.pdf
    • https://s3.amazonaws.com/kubafezin/how_many_sheets_can_excel_workbook_have.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f070.bin
bb0a4144bfb20e71eecc2632292d808d2a53f77b5813dac37b5ee3852daaac1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF070 5328 bytes
font_01_sfnt_off0001026f.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1026F 1800 bytes
font_02_sfnt_off00010afd.bin
38f318b4b3c6c3bc51e5a9867782afb341efa23774419b4cd5a87da170113cc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFD 10616 bytes
font_03_sfnt_off00012f99.bin
aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F99 16312 bytes

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