Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8dea5ed9f89ab46…

MALICIOUS

PDF

92.8 KB Created: 2021-07-01 11:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0c80e0870df354e25f5ff1339b9fc743 SHA-1: 4a83ba60803731df1739d7e68c52302444aeb706 SHA-256: a8dea5ed9f89ab46869edf9150a5e0d8366c493d649fea9d37c72ba9c65838da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as a link farm, directing users to various potentially compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/2eo6npkib5errrqjrgv8hc16tp/todekudojisopirojuvog.pdf In PDF document text
    • http://terhautz.com/upload_files/files/juzabe.pdfIn PDF document text
    • http://kuppersbusch-center.ru/uploads/files/rogijaz.pdfIn PDF document text
    • https://nevisnews.com/userfiles/69599481265.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/naxebotovojowaliwavag.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/tefvg22fck0artji4hfsjtpp13/manoziloligekulerivapeb.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/61839327131.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dd0c7f40f---lerijikuwaxanavozotanu.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/80049938908.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877070047c2---tinogudezexuzuk.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d38e9c425b---42632484393.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/5cbda781aa5c79fa1e3486ee6331a00f/xurerakolikaperadapa.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/733877c97b0e51d2b86992889ad4ecc7/mikojarewupebadojabadekew.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1609d632c9382e---jobozijivi.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160d463467cb3d---vagaduwu.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/7117519789.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608543c003ddd---30868187575.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/21439815823.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/579fd94cce1efe1f163572db0af8e522/bonul.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/gixotowiwe.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/47604826578.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea3f86ec26---gevep.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/lewamifetonomivejesuva.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/suwodedejaledetubewig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=cubit+meaning+in+englishPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0E 17088 bytes
SHA-256: 691c202ea47b7461a6cff636421fbcd4fb5e326ffba5c74a75bfa3a8f06dccf4
font_01_sfnt_off00010832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10832 10604 bytes
SHA-256: 77295c3018d84b6dd0a4b03e58033bc105b5118091ed288e90a0dad990acf64d
font_02_sfnt_off0001203a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1203A 17468 bytes
SHA-256: e01f2986a54ef35495b92de34fb68267241dd3ba1c696ae3da446618edaf9cbf
font_03_sfnt_off00014d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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