Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd1c2f1a018c9dc…

MALICIOUS

PDF

94.3 KB Created: 2021-09-30 19:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 2cffb0d7e7430327dd08770a41cc916c SHA-1: e7aada5d322861cc840a4087389a085ba2d2d0fe SHA-256: 1fd1c2f1a018c9dc55b9dd20e4f471de8b5dfa589fd9a092fdd3e7f967392e1d
132 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 CMS uploads or disposable hosting. This suggests the document is designed as a lure, likely for phishing or to redirect users to sites that host further malicious content or exploits. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2807

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://smidgel.ru/uplcv?utm_term=pokemon+heart+gold+cheats+rare+candy PDF link annotation
    • https://hongming-eco.com/userfiles/file/pojasesoxuzewimikurekesaz.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/6q41lk1q1fhs4ih37mc7l6cjq4/80895786925.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/9214680309.pdfIn PDF document text
    • http://europavloeren.nl/siteimages/file/pavubixojuxakajofiponi.pdfIn PDF document text
    • http://eastindiaspray.com/suvra/eastindia_spray/files/31265125552.pdfIn PDF document text
    • http://condominiobrisasdelnorte.com/userfiles/file/9290335760.pdfIn PDF document text
    • http://www.mananthavadynorbertines.org/www/js/ckfinder/userfiles/files/46455287237.pdfIn PDF document text
    • https://houstoncoinclub.org/FCKeditor/file/lebaxodevekabirir.pdfIn PDF document text
    • https://sinarwaja.com/account/files/98999498796.pdfIn PDF document text
    • http://greenglobepms.com/uploads/25988445936.pdfIn PDF document text
    • http://potlista.com/file/files/87671766304.pdfIn PDF document text
    • http://sangiorgioautoservizi.com/userfiles/files/nawij.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/livilanavozet.pdfIn PDF document text
    • http://hawaii-resort.info/images/blog/file/72338422916.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615131f004509---62170228130.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/4446584350.pdfIn PDF document text
    • http://modaxch.com/userfiles/files/sokumoxaxerexi.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/letugujikejiwibikofesajo.pdfIn PDF document text
    • http://swotaweb.com/img/upload/file/71693892449.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/161368641383a1---xikokoteroge.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16136ce82c5b87---bidilazo.pdfIn PDF document text
    • https://hongdung.vn/ckeditor/images/files/87560443211.pdfIn PDF document text
    • https://casartigianiudine.busletter.it/ckfinder/userfiles/files/xejojivugugenin.pdfIn PDF document text
    • http://saint-party.com/media/file/senonokej.pdfIn 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_off00011a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001329c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1329C 10932 bytes
SHA-256: 9e39090bb214b4fe8cd5d224500ce880df04457dcd957bec308de6ffdff20d18
font_02_sfnt_off00014b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B9E 20764 bytes
SHA-256: 476335467edc50b55d959bbe341a2fe183c7062ab2829b830c1eb51d8cd7d166

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