Malicious PDF — malware analysis report

Static analysis result for SHA-256 9996953e46300ed2…

MALICIOUS

PDF

79.7 KB Created: 2021-09-01 18:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 846ad3536dbb24b1bcdab69f359e50da SHA-1: 209849c18d6ff06d73779d7f45b9c54608b12532 SHA-256: 9996953e46300ed24a69e4c5ffaaa26987425eae17f1341ce710cacf46c6a397
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as hosting for further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to lure users to external, potentially compromised, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6314

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://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/28f56a2ab0b1bfd6f8bb3efda83fe9bb/27161556878.pdf In PDF document text
    • http://www.allatpatikapecs.hu/images/file/15151289177.pdfIn PDF document text
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/74090375808.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/d589l8fbm6me1ga58oiu3eqi1a/vizam.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/vidax.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/95370aac9c1f2bc78751b76b593f29ce/rewipi.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/4ecf106997af1d0568376223f00f41c7/90670164677.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/zikewomarixewawuxuv.pdfIn PDF document text
    • http://www.contal-farmer.com/uploads/files/23379198208.pdfIn PDF document text
    • https://mvservice.it/file/76910870053.pdfIn PDF document text
    • http://psychanalyste-gard.fr/ckfinder/userfiles/files/buxajavazevedifuririmen.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083bb7d3c631---79017346135.pdfIn PDF document text
    • http://le383.com/uploads/files/linozevanekaxipilinupozin.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/pilapitatazukidudumi.pdfIn PDF document text
    • https://mytopics.it/uploads/file/81250622670.pdfIn PDF document text
    • https://martabaktelor.com/contents//files/novatoxuwisitibopepe.pdfIn PDF document text
    • http://gistfamilyreunion.com/clients/8/8c/8cbf0a40baaab9dd4734ff2cdbb1e120/File/dotupoberofajipipimif.pdfIn PDF document text
    • http://spadhotel.com/basefile/spadhotelcom/files/piwogusavaxed.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a7bb6bc40---73985342007.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/xoraxuvexanid.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/8c0f35866011af8da94a19d2f0d8829c/wolakeroperibuma.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/pujepad.pdfIn PDF document text
    • https://magnettoptan.com/upload/ckfinder/files/numutibe.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaaa80694aa---1057850861.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=the+cosby+show+hillmanPDF 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_off000109b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B1 10600 bytes
SHA-256: d826185c7817e4e23e60e4a3041e942e150209078426e706d16a1410133d1694
font_01_sfnt_off000121cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1