Malicious PDF — malware analysis report

Static analysis result for SHA-256 f91fd2d329894cad…

MALICIOUS

PDF

69.3 KB Created: 2021-09-01 03:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d77f3bdce2256f35473a6f4b87bdcbf4 SHA-1: c174c0dd09b2cc536ef267ee727a8e6408152662 SHA-256: f91fd2d329894cad840358eb6fd016d579d75b2780d82e4ac7b59ea3e4d6109c
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8414

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 http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609fab22467e9---jixazitawon.pdf In PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/daqmdmt79b7lac3a6v84ee2686/sepaxusolatixulepu.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/madorupexamuso.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/89256710589.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081b0b57e1e0---30945036725.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ede1533627d---vipemodewixi.pdfIn PDF document text
    • http://heldermusic.nl/ckfinder/userfiles/files/86334945271.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db18257ef7---xubamupadoxode.pdfIn PDF document text
    • https://itexpertdog.com/upload/files/26510931721.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/54771321288.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/eciqlgu7h0dl6v6c7l7qdha2t3/82006497929.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/75583254060d8066394eec.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/fb783866b376908528afcf53ae52e777/39547714702.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/1d1d0cef9a64bbe2f776f783eb110bc9/pariketasewobe.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e5bba03cb6---84676198535.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/11910777910.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/b21cdc784a4bd1a3053f3c8ddd31ba53/vitozefav.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/928i9hfj10b5bi5u5nrm4dtvjn/kagamebe.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ae73b6f4d---90644079007.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/dujabupapax.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd264e1d37---bibijuzifikebovugevezebe.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882f0d4b88a---24053968357.pdfIn PDF document text
    • https://jordanadams.com/ckfinder/userfiles/files/8057735469.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=me+before+you+durationPDF 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_off0000e967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE967 10480 bytes
SHA-256: 2493d2da90ccbac6e60b9e086f50fb8a3a6134b2519a62fa7c27d8d4cfa2346f

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