Malicious PDF — malware analysis report

Static analysis result for SHA-256 d99768bcfe1b8fe4…

MALICIOUS

PDF

72.0 KB Created: 2021-09-06 15:21:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 08bc5948874f7ca96eea946dd94c1ffe SHA-1: 679db892840800d5e140458652818460f4c46930 SHA-256: d99768bcfe1b8fe49a15a9648fef5f93ec68f6fd7c4739910f2e42a112e05214
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to lure users to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7857

Heuristics 5

  • 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.
  • 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://netshopnepal.com/userfiles/file/69351742914.pdf In PDF document text
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/97395728438.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/penitenanixexogivaluma.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/19782695723.pdfIn PDF document text
    • https://martabaktelor.com/contents//files/44678650827.pdfIn PDF document text
    • http://alajwakh.com/uploaded_files/userfiles/files/61691056923.pdfIn PDF document text
    • http://cloverpark1960.com/clients/1/17/17c242f0968dc4bce059666b43fbd075/File/jawinusiziwineruwelekibeg.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/ebuti2e1m7kaifha01oto5s913/rolipimumetoxozomajij.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/36171792203.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/4ef66d6e30b0178b9eb08a25cc40f6fb/bujuduki.pdfIn PDF document text
    • http://csc0311.com/userfiles/file/20210808121012_33gfgz.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/3221585e4cc5dbad00b7435891eabd86/jewikalipanejixudas.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/goper.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/12664008199.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609861f97aeea---60048928812.pdfIn PDF document text
    • https://indiachristian.org/uploads/files/55939396145.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/mugukokino.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a204ec41d---jazuwoziginoviluxatob.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c899c00652---taxegokufivufaf.pdfIn PDF document text
    • http://strahyi.ru/images/file/pitalolagefakaz.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/57314922543.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161007e38c8cf6---pikemow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=filosofando+4+edi%C3%A7%C3%A3o+pdfPDF 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_off00010a2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.