Malicious PDF — malware analysis report

Static analysis result for SHA-256 e84a4bf78f8d7cfe…

MALICIOUS

PDF

86.9 KB Created: 2021-09-04 02:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e528c537e995326a34c017b3f39bb26c SHA-1: 79f138198dfadb5b6a7b5a61806be7f8a3c6ae22 SHA-256: e84a4bf78f8d7cfe811dcc47f24dc51e009b38750ac51e549d6eeaba0a93aaf0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many pointing to domains that appear to be used for hosting malicious files or as part of a link farm. Heuristics indicate a 'link farm on disposable hosting' and a 'compromised CMS upload link'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://hardlineconstruct.ro/app/webroot/files/userfiles/files/xegakup.pdf In PDF document text
    • http://pcccmiennam.com/media/ftp/file/95588873554.pdfIn PDF document text
    • http://greensketch.in/userfiles/file/siwoxokobi.pdfIn PDF document text
    • http://zpkprzemysl.pl/ckfinder/userfiles/files/26545086195.pdfIn PDF document text
    • https://termoformat.md/img/files/vawaketukesitolafaliwop.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/mufefagogoravanivopurafi.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/s5ehuqi8km72q6nchuejmcrnrm/satogesokoliretaxiwo.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/ponafaj.pdfIn PDF document text
    • http://htwy.com/upload/file/53293683553.pdfIn PDF document text
    • http://lucann.com/Upload/file/wapotimelerupa.pdfIn PDF document text
    • http://ymmicro.com/files/files/67727104469.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/savamatofilibulava.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/jijelagosax.pdfIn PDF document text
    • http://dges.in/userfiles/file/57817438513.pdfIn PDF document text
    • http://skulpt.in/admin/uploads/file/gosigubomurugini.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/tupefexogem.pdfIn PDF document text
    • http://antonellascarpittadesigner.it/userfiles/files/15668755406.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c7df8be7c47c8272584c430c2b0d45ca/fonaporizoxa.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf76d036fb---37844350511.pdfIn PDF document text
    • http://www.icf-plant.com/files/file/25224919895.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/68294944553.pdfIn PDF document text
    • http://geostudio.eu/userfiles/files/fuwowiveba.pdfIn PDF document text
    • https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/b06178826bd61e125fc57714f5824ad5/42506686464.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=metaphor+in+english+pdfPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff06b2bdf7---fenadajofomaja.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_off0000ee2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2A 18400 bytes
SHA-256: eac0ef536eef4d64e09d4138e3122c5ee5f6c158ffe9950afed6d9f070764ce7
font_01_sfnt_off00011da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000135bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135BB 10768 bytes
SHA-256: c14d6d307bce24520dfe7955958ccc2cf08906da7bd0622184fddb4d7fb2b92a

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