Malicious PDF — malware analysis report

Static analysis result for SHA-256 3307f40a063811ca…

MALICIOUS

PDF

81.6 KB Created: 2021-07-17 12:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 2d6055b08641546aee661d8d03e81b16 SHA-1: 1c57cee331e5a01d658a37558504dab7a44dc0f3 SHA-256: 3307f40a063811cae3ad7cd0930d4649d3f398ea66839d014182d38b0eb4a9f8
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

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://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/5ia1mbjp8o3scl3g9trg459d38/78345335099.pdf In PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a749b378c17---natonomumisisavofavafixir.pdfIn PDF document text
    • https://aspirans.com/files/file/71234872699.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/9qhjbc75qddgbh7c8i9oek8laj/94126147215.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/bddb192acb0892d2126037880099d3d8/5522042081.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee73518e073---panatolarawufefobof.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609effe23a46d---49927603920.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a463c3ec4---36588814135.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c5676fe96---34130779229.pdfIn PDF document text
    • http://dostavkaturov.ru/files/file/72472815708.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/60913563447.pdfIn PDF document text
    • http://eastmoorclassof1970.com/clients/4/43/4343e427eb1b0a0668350338a4d6b623/File/sujofebukoduz.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/eb8aa831bc893612fa7022c6ddd22780/58672349379.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/79omrhgr362cnhbpd9ecrjnki2/zirodewa.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210505063046.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/rdcesbfre2rgii4g1vp1im0q11/mogezos.pdfIn PDF document text
    • http://klinok-saintp.ru/files/37917758034.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/406d16d6ca75858c870ce1dc30914507/16876356077.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/71913602909.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/c4ef918f0d465f013be27d44277212df/kanipavuxosaporewujirudir.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/76vvu8en1lhr9ub3ke0mc4nnq6/wadegufozumaxejebi.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/80531655188.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/pekuvumobudesiguza.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/4497db3abd47ae00874d5bde04c8986b/49517672690.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=answers+to+lord+of+the+fliesPDF 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_off0000f165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF165 10356 bytes
SHA-256: 6aa4e1e5cf6d56849505c89c24bdff52ba00c7cccf240f88ca0d96cbb8ae7b0d
font_01_sfnt_off000108c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C3 18844 bytes
SHA-256: 416c06bfe0a8d1595cf3aa7add27d5dc2e928a6cac589cf704fcdafd848b8aff