Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab34c1cc79c52e9…

MALICIOUS

PDF

69.3 KB Created: 2021-08-09 11:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 94d977177150fb7e090d17e09ea80f74 SHA-1: 6086809a6af6d07196a7881fc458dc2132361d04 SHA-256: 8ab34c1cc79c52e98d97a7be25b171ec1a13fe73203f6998762b0e8c69a5b1ac
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8460

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.
  • 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
  • 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://morebricks.com/ckfinder/userfiles/files/paruvipikimaniweporuzinut.pdf In PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160828a47b5114---pobijuralukafigividojopi.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608d48a945b1c---vuvovajolefem.pdfIn PDF document text
    • https://doganagolosa.it/file/xatuzejevosedetikebejetum.pdfIn PDF document text
    • http://fizjoactiv.eu/Upload/file/83844980143.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a49a3d88f---33905718191.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/guforewet.pdfIn PDF document text
    • http://tomei4x4.jp/js/upload/files/67603765237.pdfIn PDF document text
    • https://nibrasimansch.com/userfiles/files/jutasijifivot.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160bec8007c8bf---banukagozoziwolilabezuvux.pdfIn PDF document text
    • http://xn--80aaaaaikdebj9ccf1ayja1b5a3q.xn--p1ai/ckfinder/userfiles/files/6792619024.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3957f0e51---dezusoterote.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee4052fb38---lunukajakimemezawarabuja.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074f9216573d---47464499340.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6dca958053---73469433498.pdfIn PDF document text
    • http://tetraeng.it/userfiles/files/58238828027.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/14627266788.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/sugifumozefuvepar.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d813813169---mudojewukisovuzore.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/1bd6e80746a8c183c17b0839df43c249/24623690417.pdfIn PDF document text
    • https://people11people.com/uploads/File/74440564666.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/79f88495e260544a7899fecb6bd5b8d6/80286633233.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021053122425190.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/robudexeravude.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=how+to+clean+nubuck+hiking+bootsPDF 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_off0000f9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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