Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc1d9b7f9a3fee6a…

MALICIOUS

PDF

80.7 KB Created: 2021-06-30 06:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8f37d36409be834eab7a418606b14255 SHA-1: 3366ef76cf4f41fafeedbc355c656bcf830cfe0f SHA-256: dc1d9b7f9a3fee6a0515bee60018f76f7b5a8624ca787cb22ec00dc070926ac0
124 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS upload directories or appear to be part of a link farm on disposable hosting. These characteristics suggest the PDF is designed to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4210

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://flambotour.it/themes/userfiles//files/silim.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b258649efd8---39461687892.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af7a453031c---wafabojivorapedizilex.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/24u3h89irscdfu309eesf6vfs3/zitelesege.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/lern6c0j5trp3b9q904ea218t7/91896885605.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160971f5a34dd3---zijafexutetovenijawevamof.pdf
    • http://summithighschool1958.com/clients/71652/File/28015217925.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfc9c66653---dumejitu.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/3pbldf1i5upmd6fm0l9gph9bab/80010752386.pdf
    • http://mrmax.ca/clients/9797/File/lilijewamabopefemajaduvaw.pdf
    • https://nocenzura.space/web/img/podborky/files/22744559716.pdf
    • http://lambanghieuquangcaogiare.net/vietkiendo/upload/file/67144062234.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16070ef032cdc0---lotosutegonofogijixapufa.pdf
    • http://rayanchem.com/d/files/wireviretenufija.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/v2pras3rm2lj48162q3ersuet3/50918181931.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8067c6949a---44726326699.pdf
    • http://minhnguyenvn.com/uploads/userfiles/file/91061223443.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/30af87e1b027f304bd30cb4d5fbd8c40/89408671677.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7c70a3211---ragabameduvaj.pdf
    • http://afghansolar.com/userfiles/file/lesigafavedekunuzekuresu.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/4cd961f5ff07cd68b3392143dfa0d658/36791427327.pdf
    • https://al-wesam.com/userfiles/files/51671687801.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/bc882156a0e4ee4118c6850717e5f751/79841200386.pdf
    • http://clasesholandes.com/userfiles/file/pibekurigunatebifasoriv.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=growing+marigold+from+flowers
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cc3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC3 16792 bytes
font_01_sfnt_off000124da.bin
e31a971d6ca1a0af74c0fe455dffa25028e131db45b087717f83349d8af79241
pdf-font-stream PDF embedded font (sfnt) at offset 0x124DA 10724 bytes