Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8e4086648018668…

MALICIOUS

PDF

90.0 KB Created: 2021-09-20 23:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e1be9f1f713038eae8dacf75769a409e SHA-1: 109053dbd179d07bf811de6698377098a414778f SHA-256: a8e408664801866800f36fb79fb53914723df0fe664158eb5d23711c1a564fd9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many of which point to compromised WordPress upload directories or disposable hosting. This indicates a link farm designed to redirect users to malicious content, likely for phishing or malware delivery. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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
  • 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://regaluxiluminacion.com/uploads/assets/file/40517142201.pdf In PDF document text
    • http://to-kajihan.net/js/upload/files/vawadapipasofuruvev.pdfIn PDF document text
    • http://alatasfilms.gr/ILC/img/file/62756956233.pdfIn PDF document text
    • https://ssekolkata.com/ckfinder/userfiles/files/nogitekazimonorup.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5b7d630f9---molomajivutokiso.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613abc7216634---pijebivud.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/telun.pdfIn PDF document text
    • http://www.tamtrebinhminh.com/public/files/56023940074.pdfIn PDF document text
    • http://www.extramas.com/userfiles/files/tixesulasekujezap.pdfIn PDF document text
    • http://dakov.hu/_user/file/riperofidinixe.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16145b13c92faf---gonodaj.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/mikawosigum.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/161416e755c1c1---86674562254.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/fobaxedade.pdfIn PDF document text
    • https://gizaviation.com/uploads/files/terisutilabodelasipakeza.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/binonekivevula.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/sfc89b7qvfrd39cabjutc1glo7/xerurokirovakaratofuwil.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134034f1dff1---mozesabitutoxasakunukok.pdfIn PDF document text
    • http://seasonmediagroup.com/pic/file/92375048118.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/28653182111.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/6312657432.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/vewisivijijise.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/6224950135.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/kenobavijax.pdfIn PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/79804742396.pdfIn PDF document text
    • http://njchemland.com/upload/files/78520198212.pdfIn PDF document text
    • http://hsound.ro/images/custom/file/vijamitoxadukogekelukig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=junji+ito+manga+pdfPDF 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_off0000f3e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C00 10616 bytes
SHA-256: 7485981cb5c48db3bafae16b432f0cbcc383699c8de6b93fac826c6f77b2a545
font_02_sfnt_off00012401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12401 20892 bytes
SHA-256: cce68d8cafa743d77e5aa1426d58c50c1e15e54f0dc711c82419206502bb2621

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