Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed831fe5c8aeddef…

MALICIOUS

PDF

148.4 KB Created: 2021-08-11 17:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 735a6e2b4aedb23e74ba17ad0cdb0149 SHA-1: 17a341611aee01a434d0cdfa9fff6a7c09468091 SHA-256: ed831fe5c8aeddefd6587d425d25770cf381347b719f8ef8073d48601ffd4e5a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to distribute malicious content or phish users. ClamAV detection and ML classification confirm its malicious nature. The presence of multiple external URIs and link farms suggests an attempt to exploit users through indirect means, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7751

Heuristics 5

  • 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
  • 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://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/q8u1p1j9ghjilhmq2bc7s1q2jd/fikozogilotevekes.pdf In PDF document text
    • http://shukokai-voves.fr/userfiles/file/devexulozekemarer.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/zivaxikijawalero.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/99247912255.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e9f44d4b6---47915198573.pdfIn PDF document text
    • http://uitvaartverzorgingsindex.nl/images/uploads/turoxexokami.pdfIn PDF document text
    • http://stpatricksreunion.com/clients/84553/File/44668037432.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/10580984353.pdfIn PDF document text
    • http://studiocastigli.eu/userfiles/files/govanopowiwudisobavaxuruw.pdfIn PDF document text
    • http://dungcucaytrong.com/images/files/13606423080.pdfIn PDF document text
    • http://jessicarossitto.com/clients/7/7c/7c16b8c799dae9ffcd1258f31d6ff645/File/bakewojikivokeme.pdfIn PDF document text
    • http://candientu24h.vn/webroot/img/files/xagisarolejigovuwopoji.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/jotuxe.pdfIn PDF document text
    • http://agrion.org/upload/fichier/77219258945.pdfIn PDF document text
    • http://17njl.com/userfiles/files/27745374352.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b11bf378d---wilepinuzezo.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/kimaxugebinefukejiku.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/544411528cec1fbc3d3681bc37cc8db1/muwalizesanopogofasikiw.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79ed4cd0cd---2774227029.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/5758714656.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/93264c675125090f3921b340718bc9b4/libizefi.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607114c8007b1---rinogudatanitofetumutufi.pdfIn PDF document text
    • https://chungcungoaigiao.net/uploads/files/guvitazelugodu.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/nasumi.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d12aca0022---33326968184.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=fingerstyle+guitar+tutorial+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22303 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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