Malicious PDF — malware analysis report

Static analysis result for SHA-256 2225951e042a8985…

MALICIOUS

PDF

95.6 KB Created: 2021-09-02 11:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5c38d06e505278e23ea11abcef74c16c SHA-1: c9e91ed3c7a8b56858b4837e0bb74e655000ebb3 SHA-256: 2225951e042a89850ef12aed62f3e19924c25c30e48d020aed74ac77565be6ad
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and other disposable hosting. The presence of multiple links on disposable hosting and the use of UTM parameters suggest an attempt to lure users to malicious destinations, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3968

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://tornado69.com/clients/40643/File/sokuwalatowizotesunas.pdf In PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/d3b4f0588c2f327a2c3bbeb4edbc3a4c/misunuzofovu.pdfIn PDF document text
    • https://pmfegypt.com/userfiles/files/julidumozosed.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5762e677f---pifojegejo.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/11637884409.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e21ba59e219---wojunag.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0b41b490b---79224472074.pdfIn PDF document text
    • https://nevisnews.com/userfiles/9866635600.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1f6812d623a467b5f13fe2fe11592744/suluk.pdfIn PDF document text
    • http://studiogiovannone.com/userfiles/files/66983310102.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/109057642c251273cad53e107dcb1cc7/vesesibij.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/5ba135d9a92213782defaaad9da0f391/katededisomogarajamij.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16081fa7730ff7---55827315355.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/7b4lnhm4assa3tpfub617g3vrr/pinifofopovuwajoxu.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/ubup2jpifh8sqa60pg9opk2h8i/muxakisano.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/53834534150.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160929c694d9bb---rezabivakikufavulekojetow.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160f9d8bd7f2dc---29276184396.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/bc71dcaa835639ff8dd9a4452a2b07fb/39326111632.pdfIn PDF document text
    • http://noithattamphuong.com/upload/files/muwoderupomi.pdfIn PDF document text
    • http://namlongprojects.com/images/uploads/files/85067552750.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/3771ede57fe421d12010430fd949e85b/xepisirojuniwonigen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=krups+burr+grinder+gx5000+manualPDF 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_off00012826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12826 11104 bytes
SHA-256: 4d69de9d3ed28a1c3e9e0aa08696724b8e6bbdffd70c9227c7864a4c7da815e7
font_01_sfnt_off0001418f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1418F 18064 bytes
SHA-256: 7fe98052a6c19ab61f6e83eec067e8018f161c60341ff1307d1087e95f66aadb