Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b44e225f6b0e5e8…

MALICIOUS

PDF

91.4 KB Created: 2021-09-06 02:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 59c99943801aa59e15070e92dd02cd2d SHA-1: 5250bf85ffe914ff79305f4f40eed1d9937b36ac SHA-256: 4b44e225f6b0e5e8dfa307dd9566973a0a7ed9fc0920dc2d42fe73738c14f7a0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded JavaScript indicates potential for further exploitation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=philosophical+aesthetics+an+introduction+pdf PDF link annotation
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/db7c9352f971aee1b919b0c18cec7598/wilojun.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021043010282273499.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/medini.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b870b6de1---73261391464.pdfIn PDF document text
    • http://baybayankaauamo.com/clients/c/c9/c9e0f772d4a556598cfa564a27137582/File/fukutupakamev.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160767de0aa071---75819134286.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b34253cc584---82675028421.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/13652914788.pdfIn PDF document text
    • http://kotolantopeni.cz/file/razewijonalulelixowixi.pdfIn PDF document text
    • https://euinsuti.uniluxgym.ro/app/webroot/files/userfiles/files/nejotegili.pdfIn PDF document text
    • http://virus-safe-zone.com/ckupload/files/lovonizarifazima.pdfIn PDF document text
    • http://www.palmettoexpresslanes.com/system/js/back/ckfinder/userfiles/files/jufamifidaxidipilikiv.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/tedosejevukaxa.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d88177f39---79454495595.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/f1f518e60018b11feb334020bba6d103/73759615926.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/veseranusujezo.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1610680b8962c1---1432981701.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/6930822ebe840dbc62194bc27a466972/9414185058.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1610105a9b09ba---wusivaxarusebuzale.pdfIn PDF document text
    • https://fotoprint.lv/downloads/file/96972354053.pdfIn PDF document text
    • http://rdasesores.gestconcursal.com/editor/ckfinder/userfiles/files/divepebegegivag.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/605f5be0f7a26bf12718127cf47bdd97/37967055474.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16109149434adc---69895337986.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3a1d4128d2---jofozesasejakuj.pdfIn PDF document text
    • http://ilpeace.org/assets/ckfinder/core/connector/php/uploads/files/fasimelivedizi.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/bodofor.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10068 10820 bytes
SHA-256: f4490014401261abfd0d883655774ca1c8915a2e97075bf51d78b0e7621bb30a
font_01_sfnt_off00011952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11952 18200 bytes
SHA-256: 5cd03ed5a8c5733211b691f367fb438c3ab2c963be610c72f3b7af3dd6e304f9
font_02_sfnt_off000147a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.