Malicious PDF — malware analysis report

Static analysis result for SHA-256 2df94ed3ca5ca166…

MALICIOUS

PDF

82.1 KB Created: 2021-09-17 13:25:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0d66214e1b754d0fe6a39aa561ff7e05 SHA-1: 97d3f0d1d04a3e08f9ccc0beed041caf8e2184cd SHA-256: 2df94ed3ca5ca1669020e87f143325b09f46289ccc64c90401f46136f0c99de5
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely serving as a lure for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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 https://coretry.ru/uplcv?utm_term=android+webview+fill+form+and+submit PDF link annotation
    • http://custom-mugs-factory.com/uploadfile/files/59880224371.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/37590088878.pdfIn PDF document text
    • http://kamienneogrody.com/userfiles/file/98239944913.pdfIn PDF document text
    • http://pro-roubenky.cz/UserFiles/File/36389167884.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/56770546351.pdfIn PDF document text
    • http://logicamail.it/draft/media/2527428267.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/0d9c3a2282cf526dad02e7442a415d04/50336793609.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/30e5a7589b9b83a0e6177a4c3e888dd3/dedovizanirawa.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/33664304085.pdfIn PDF document text
    • http://www.espace-hotelier.com/ckfinder/userfiles/files/pawakamimep.pdfIn PDF document text
    • https://hattshopping.com/admin/assets/images/ckfiles/428620794.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/xukuv.pdfIn PDF document text
    • http://holcom-wd.holcom.vn/webroot/img/files/44667074474.pdfIn PDF document text
    • http://telek-trans.hu/editor_up/78724923775.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/dixesexuxasoki.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/kakuravedewulegurom.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd8d1d7cbf---xazogujudajikagusafumopi.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/koguzapaziwumevidokifo.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139d4e61a3c9---dunaseterodivilamena.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/rudiju.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/83295897881.pdfIn PDF document text
    • http://ternovykh.ru/content/file/vetofelefexotavip.pdfIn PDF document text
    • http://ndt-ultratech.com/files/45172886436.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136d6522a5c5---21008341473.pdfIn PDF document text
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/nuwuferanulaxo.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_off0000d556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD556 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6D 10888 bytes
SHA-256: 7e1b244fdeed8864128aabdda45b2f428bb598f9761042bace7b21ebd89d373c
font_02_sfnt_off000106aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AA 19384 bytes
SHA-256: 27899028ed39b8b76dedd56d1adc9fb2214af9580ddc28d11a6eb2eb6ee2098d

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