Malicious PDF — malware analysis report

Static analysis result for SHA-256 461b27b5948f17d4…

MALICIOUS

PDF

83.0 KB Created: 2021-08-21 11:34:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 717799da13889538b267be42f2691f5c SHA-1: aa30e49a0e7e394c9925d2c8c4b2db6871a35b98 SHA-256: 461b27b5948f17d46d9ff122e722e46d6537e936330fed5b686f20eedf0e4129
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, indicating it functions as a link farm. The primary goal appears to be directing users to potentially malicious external websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606f68b654370---60150723856.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f8f069578b0---sabuxixipusurori.pdf
    • http://peterpan1996.it/userfiles/files/dotifados.pdf
    • http://joyandwowbook.com/upload/file/44764372418.pdf
    • http://easthighclassof1962.com/clients/2/24/240b89ecbeded73b1ae3fdc7544f4fd7/File/jorunovavebavenajubemix.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16116dba9be0d4---goxumezotatin.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739e0cd92b3.pdf
    • https://houstoncoinshow.org/FCKeditor/file/buvuzudojadariwi.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16085ffe4ab4a5---74414284510.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/983c8021fa7241cbb6f26ca69cb2d0d2/26206075047.pdf
    • http://cableesmaltado.com/d/files/51607129910.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a628a76dfee---zepajixakagesaw.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/556ab98ea1b092da27e97aaaa2fc1f41/rilojaxanupesukiwuzopofu.pdf
    • https://srmhospitalities.com/images/bulk_images/files/vitizir.pdf
    • https://biomisszio.hu/tmp/xatererivejixevene.pdf
    • http://kleinschadenexperte.de/userfiles/file/petupofekipelumidolaba.pdf
    • https://loyallcanada.ca/editor_files/file/turejelagoxikoxurezidig.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cec1fbcbed---besapemexegafovute.pdf
    • https://medtek.vn/storage/file/mapovego.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a803076498b---nojemo.pdf
    • http://lixupeng.com/uploads/files/rerupegofulobufap.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/b037d223c5a74f4426001b2cb3b7d980/dalabezexivufazix.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607578576a940---38064859507.pdf
    • https://infotechloyalty.com/bot/ckfinder/uf/files/50008623642.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdc7364c5b---rifigigeguxewasazumes.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/b01edd0a2f2c0e672c3465c423714191/3523079795.pdf
    • http://jirehenl.com/userfiles/file/191227121047.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=what+does+bible+say+about+moms
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2df.bin
45de38aa963a2324a7323b2317ee69107f7a7d246a82fde31074f3a4272982af
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DF 10656 bytes
font_01_sfnt_off0000fb48.bin
b898503fb287e68012025a33db0da5356ae651b6dc30c0c32a6b399e67eb74f5
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB48 16340 bytes
font_02_sfnt_off000125c0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x125C0 16792 bytes