Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aa4baf2b447eefd…

MALICIOUS

PDF

81.0 KB Created: 2021-03-20 17:55:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92f559ede7faef0bec8996bead2d0553 SHA-1: e1b539a51ed9e9b7ce299190ffb774643a13a09e SHA-256: 2aa4baf2b447eefdbea79692196171776a3cb65157a811dcc3f7b75a7ca580b4
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, indicating a link farm strategy, and one of these links points to a URL that appears to be part of a phishing or SEO scam. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity, likely involving the exploitation of PDF vulnerabilities or social engineering to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://leonvi.ru/wix?keyword=evenflo+maestro+booster+seat+manual
    • https://bafuzonexive.weebly.com/uploads/1/3/0/7/130739369/suron_lutimif.pdf
    • https://misamizejip.weebly.com/uploads/1/3/4/3/134348089/4112105.pdf
    • http://jusapp.club/which_basketball_backboard_is_bestirxbe.pdf
    • http://bezerojiw.scienceontheweb.net/dikomapinokifun.pdf
    • https://cdn.sqhk.co/xadakede/jZB2jez/water_slides_for_sale.pdf
    • https://cdn.sqhk.co/movumatoz/ijjimie/77542378840.pdf
    • https://cdn.sqhk.co/fogibadeku/faSgjha/sesatupu.pdf
    • http://wivevadevenumet.mywebcommunity.org/on_green_dolphin_street_miles_davis_transcription.pdf
    • https://cdn.sqhk.co/tibidimewako/jdehaif/drift_hunters_2_unity_webgl.pdf
    • https://sosufafa.weebly.com/uploads/1/3/4/8/134862430/toweguzugamoril-zubawaw.pdf
    • https://cdn.sqhk.co/kunimanujage/helggjc/89659807454.pdf
    • https://zabavorurexezab.weebly.com/uploads/1/3/5/3/135314693/7045578.pdf
    • https://cdn.sqhk.co/xaripisi/hcigrFI/julagoni.pdf
    • https://reropazorulofo.weebly.com/uploads/1/3/4/4/134437501/xuxigewam.pdf
    • http://krepezh.guru/market_wizards_audiobook_youtubeviuol.pdf
    • http://tometifo.getenjoyment.net/how_to_apply_for_covid-19_unemployment_benefits_600.pdf
    • http://kihepc.xyz/bookmark_onedrive_ipad90ru4.pdf
    • https://cdn.sqhk.co/fugolamudara/ZWihjc1/line_graph_template_download.pdf
    • http://kellys.space/gray_s_anatomy_review_book5y0dp.pdf
    • https://cdn.sqhk.co/tokititagiwe/iablhgD/primary_games_monkey_go_happy_cabin_escape.pdf
    • http://famozosivupiwij.sportsontheweb.net/cuales_son_los_misterios_del_santo_rosario_catolico.pdf
    • http://itanah.space/wenixekinikabisolibezwfhs5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/purufiz/armour_landon_austin_lyrics.pdf
    • https://s3.amazonaws.com/luborinizu/93271414201.pdf
    • https://s3.amazonaws.com/fajetufekejo/wood_burner_installation_manual.pdf
    • https://s3.amazonaws.com/zaxefemebidaz/sacramento_hourly_weather_report.pdf
    • https://s3.amazonaws.com/fexuror/facebook_page_templates_for_business.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0f7.bin
2a534a3fb585222e9a50e6475a0cfaf328e32590d64df5c4fd05ed8c790b846e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F7 4904 bytes
font_01_sfnt_off0001018d.bin
4789365eed54149f4a458d645157f5753504f4ebc9e779c0de92c0281b35f695		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1018D 11612 bytes
font_02_sfnt_off0001284d.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1284D 4324 bytes

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