Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e510319b8b054af…

MALICIOUS

PDF

281.1 KB Created: 2021-07-03 05:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: b09d3f4df255e93c278e37922bcbcdc7 SHA-1: f1ae919a8076cfb220da8ecc2cb8d1bbbc1336e4 SHA-256: 4e510319b8b054afee930529cff347361f2c994530ef67d281168838dfd213ad
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9730

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/d489dc96b1381ef39f6968ea05304ef2/dapan.pdf In PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/0cd4068882ced388a5fb08f4af32569a/44087339152.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/30719942829.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/eaec4439e52005eb92478c343e74e640/84764712651.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607899ab17d65---63761158310.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8b3dee8ee---10984919290.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094bbde341c0---40903868563.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714d78f1cd3---76859169098.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/36831135619.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbcbb465f6---gijerodadimafoso.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/32831310845.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/radowewimejaxarizuvebup.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1bf7ee1c3e---puvewerutigugapu.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/ds4d1ba2kgp8rft071tq80f6q3/87930574441.pdfIn PDF document text
    • http://premium-t.info/files/files/64133901998.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/vizarirokid.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/48d6aeb421fe4221f839590ee33299eb/59960116729.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/ladewi.pdfIn PDF document text
    • https://airshow-bg.com/file/sagopowudo.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/ugmojprggguame7plukbl18pdd/87969453428.pdfIn PDF document text
    • http://novichiha.ru/pic/file/duwid.pdfIn PDF document text
    • https://europartner2.pl/uploads/jurelafuxizew.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/g1dbr7nmkhsf86sn4fm6vjunk3/bafewalitasex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=respectable+sins+discussion+guide+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003f320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F320 10980 bytes
SHA-256: 915a65eac88b3911a4be94e76b66219475f5a0760189f08bece10947a074a9ff
font_01_sfnt_off00040c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40C56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00042468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42468 18420 bytes
SHA-256: 93eb89697230e22daf8c1db39d493d2ed7b497ae56af29a9f304609c99afd87e