Malicious PDF — malware analysis report

Static analysis result for SHA-256 9328209f7975195f…

MALICIOUS

PDF

69.6 KB Created: 2021-09-19 08:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a0c17cb16458b1d25e13d8aaa83dca76 SHA-1: 749156891839e8620fd3d378b14af25e43947f89 SHA-256: 9328209f7975195f648f34296925d575081cfc4759c64d980217a14d731f3f0b
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised CMS upload directories, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8538

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://cfi-registration.org/buzzboxgift/img/userfiles/files/48052998503.pdf In PDF document text
    • https://peisheng.org/uploads/ckfiles/files/614307c80aad3.pdfIn PDF document text
    • https://dpengineerindia.com/admin/userfiles/file/guxetub.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/nur7p978cptnq2bt5uhbkbprtl/benetagasikimixaxativatut.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/161427d2d1dd0c---turaxoramipejolopawitiku.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/a5967fd51af9f38e25bb05844bc4dc85/litiwavilamozevarugisi.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/53066310107.pdfIn PDF document text
    • http://yameitecl.com/ckfinder/userfiles/files/20210904_031048.pdfIn PDF document text
    • https://pisangmanis.com/contents/files/jibavokudigezenenim.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613589975b5d7---13117114361.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/161430d6327dd8---wirofonesit.pdfIn PDF document text
    • http://bolt.fo/public_html/userfiles/files/tuvolirubononujokibuni.pdfIn PDF document text
    • https://supremeroi.com/FCKeditor/file/75925738352.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/161418d3d31d7c---87727732407.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613446952348a---webene.pdfIn PDF document text
    • https://worldtradezone.com/userfiles/file/33276044062.pdfIn PDF document text
    • https://tiemhoamo.com/data/dulieu/files/37364738083.pdfIn PDF document text
    • https://penmypoem.com/new/admin/uploadfiles/file/85559019375.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/6154460524.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/69829097400.pdfIn PDF document text
    • http://avesta-hmora.boj.se/uploads/userfiles/files/3678803580.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/10887280264.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/52b05fb066f2020e2850cf508b9175e2/48158294919.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/gukob.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142e8a9db7d7---wunafuvunude.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=steins+gate+manga+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAE 10652 bytes
SHA-256: c9f174115cd8909edee80bdef4c4e83e805a5889406edf6da2f6434b44cf15b8
font_01_sfnt_off0000e4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CD 21944 bytes
SHA-256: 0ee41558ab411b849fe5dccdfb0f5fbe2d03d2f78dc09170e17df69d026770c9