Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ce8f982321ef63…

MALICIOUS

PDF

67.9 KB Created: 2021-10-02 18:37:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 306c70cc9b84c0f84f48f7580bb2535a SHA-1: bd0c593a7ac11f67a2475fb8eb5e7d4e92472fdd SHA-256: e5ce8f982321ef63f1bd2150f11e586888b831f3e38e7daa573c225cdb0f6a57
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-heavy nature and a single clickable action, typical of screenshot-based phishing. It contains numerous embedded URLs pointing to various domains, some of which are associated with compromised CMS uploads or disposable hosting, suggesting a link farm designed to obscure the final malicious destination. The ClamAV detection and ML classifier further support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://songhongresort.com/img/files/1881482352.pdf In PDF document text
    • http://amirafouad.com/uploaded_files/file/80211028487.pdfIn PDF document text
    • https://rosenstein.lu/userfiles/files/xowivezolarexiwidodifa.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/51783825560.pdfIn PDF document text
    • http://erodiertechnik-wenzel.de/userfiles/file/xupawajoxa.pdfIn PDF document text
    • https://mimpidia.com/contents/files/xenawivezazis.pdfIn PDF document text
    • https://marathonlaval.com/userfiles/files/70344617235.pdfIn PDF document text
    • https://12shio2.com/contents/files/43289935141.pdfIn PDF document text
    • http://hzxgdz.com/images/upload/File/koboxovet.pdfIn PDF document text
    • http://schubert-hh.de/image/file/witajuzopuxet.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/65294561483.pdfIn PDF document text
    • https://grupa-energia.pl/attachments/file/27521392628.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16148083740647---zukuzigudibavimenegegojur.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/kakibimaxokumovudoz.pdfIn PDF document text
    • http://milkexim.ru/imgeditor/file/26244188460.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/fc6782534de3ce6f2104a2ebb3a9c62f/71400966335.pdfIn PDF document text
    • http://jsdarvin.com/files/zumenefajupawogirelu.pdfIn PDF document text
    • http://castel.lu/userfiles/files/nutotozuderine.pdfIn PDF document text
    • http://runbo.net/upfiles/files/16308944243660.pdfIn PDF document text
    • http://crmloccitanecr.com/campannas/file/86311819472.pdfIn PDF document text
    • https://es88.tw/pro_pic/files/piterem.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e88acdc262---beresiwovuva.pdfIn PDF document text
    • http://spielundlicht.de/content_provider/documents/files/dekomazekuxogatafexina.pdfIn PDF document text
    • http://csim.jp/ckeditor/uploads/files/totibumasodenokimepilop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=dope+meaning+awesomePDF 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_off0000ae5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE5D 10436 bytes
SHA-256: 74bfb69afd262c29b98b77a762d4d4a8fc8d9f85f41a8de3b6334e667fae4025
font_01_sfnt_off0000c60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC60E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000de20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE20 14004 bytes
SHA-256: e8a8cd1191528be3d11d3d4e1cdd4f7511c9a5e3bd679a3ac02b2bc185fd031d

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