Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ad461560e6cf3f…

MALICIOUS

PDF

73.9 KB Created: 2021-09-06 09:37:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b8c5622895907a5e905f76c0458cb79d SHA-1: 1b1201ba8959ed5f8791aaeb1f9c77b850c2ae05 SHA-256: 48ad461560e6cf3f292d9d5da16344fa182d28300459f388f3463224100ab200
154 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised CMS platforms or disposable hosting. The primary purpose appears to be to lure users to these external sites, potentially for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8482

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://gadd-asso.org/userfiles/file/97456395113.pdf In PDF document text
    • http://lawyerstitleescrow.com/clients/9/9b/9b7cfcecb5e5abb6b877b2b1d59b4eb1/File/76381547820.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/a3b2700d5b6939bedb8be82a767223b9/tijifovibenikowusaje.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/e759b578d17a6c71032f49d916a8c609/bibabadazivijonedufud.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/xefob.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/nivewowuxa.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/dubemodo.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/7e7baab29065c85d0ed28da983ca1ebf/50782550666.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/53d490cde56d386bddf02ea1227c295a/47700608789.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/ragusadikig.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/37851162941.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/90103916944.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098f2672f691---96557506206.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/mabeni.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/44120fd01e878c7a1cc567679216502a/xumomigibatefafop.pdfIn PDF document text
    • https://zegabilisim.com/calisma2/files/uploads/31405812778.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/mrqhr03nomc8380rbnl2tqnebs/17810182878.pdfIn PDF document text
    • http://emmanuelmissionarybaptist.com/clients/74938/File/31618293252.pdfIn PDF document text
    • http://ballstonfamilymedicine.com/clients/861402/File/ninuzutezusawumaku.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c51a51c02ef---14344637229.pdfIn PDF document text
    • https://ijpdua.com/contents/files/dudulawoxovobawulo.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/94727770959.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=vocabulary+pdf+filePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE941 17552 bytes
SHA-256: 91fed33c60d494748dd99944a7946d5ccf6fd1f43eede489204791e78b48164e

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