Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5a4903c23eb9f2…

MALICIOUS

PDF

71.2 KB Created: 2021-09-17 00:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1ae28a3bcca08205e26c90108f0ae63b SHA-1: 4842726ed9a7f7f3711cfa50b352bf23e36e3276 SHA-256: 2e5a4903c23eb9f2d2a49bb7b03ef02831e9e164c9fd32a7e5aaa5cb8219fb18
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs pointing to various domains, many of which are hosted on potentially compromised or disposable infrastructure. The primary purpose appears to be redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28639224621.pdf In PDF document text
    • http://4x4autok.hu/userfiles/files/bewosiv.pdfIn PDF document text
    • http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/79269644049.pdfIn PDF document text
    • http://www.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/pupazugilulapijo.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/cc554102117f287512d282bab7c81d51/33080297175.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/kemikexawu.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/kupututipibeweda.pdfIn PDF document text
    • http://keramann.ru/uploads/files/bekafadatakenovuxow.pdfIn PDF document text
    • http://gysanya.com/upload/file/210907203014948655zcsuonhlboul.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/lno2u53vedr8v8sis3jqmoh0d1/busazivapiluwivenor.pdfIn PDF document text
    • https://tumujerrusa.com/userfiles/rukuwotowetar.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/85306943005.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca1a7ba0e9---xanisijozuwe.pdfIn PDF document text
    • http://twtipa.com/upfile/files/2021/09/01/bilojedakabaledapexapof.pdfIn PDF document text
    • http://thebodyclubonline.com/userfiles/file/dawikagipefowaje.pdfIn PDF document text
    • https://bacsionline.net/userfiles/file/94701827227.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/7140755594.pdfIn PDF document text
    • https://simorgh.it/uploads/file/tusage.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/69288442894.pdfIn PDF document text
    • https://nobelboya.com/userfiles/file/rosumutimisig.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/161418627ba09f---78947241527.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/jri2qmrnc25abc9ki87j5n8de1/bodib.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/7776950944.pdfIn PDF document text
    • http://sinoorchids.com/image/file/vogejuvererojodata.pdfIn PDF document text
    • http://ccsup.co.th/uploads/ckfinder/files/pizibunakoxezototili.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=shutapp+pro+apkPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DE 15288 bytes
SHA-256: 6dc23eaff0d797153b4b528dfef5c4b8f38ef6da799ee41499fee5919dd854f4
font_02_sfnt_off0000f8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AD 10072 bytes
SHA-256: a7749c2b573433b0d41dee1afe8e69c547eb9c16e139eda7ca78e32762bc3ec3

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