Malicious PDF — malware analysis report

Static analysis result for SHA-256 387e07100a487c94…

MALICIOUS

PDF

70.5 KB Created: 2021-09-11 12:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: adc22cf198e6162291eede27efd55c81 SHA-1: 3c7c48c188580d12c54bdaf38aed85fb796df9a5 SHA-256: 387e07100a487c94e0bba78753ff66ce4383ba731d81658fe3d7da54bf034d30
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting, suggesting an attempt to lure users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 6

  • 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
  • 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://ferado.vn/userfiles/file/84332680086.pdf In PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16139ff71801a2---pakebisokajelamifeb.pdfIn PDF document text
    • https://bcm.es/files/galeria/files/tozivuxisuzixirulale.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/pevarapodifoza.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613be4bda77cb---botesuze.pdfIn PDF document text
    • http://lycee-elm.com/userfiles/file/dofobalujujon.pdfIn PDF document text
    • http://nhatrangpalace.net/app/webroot/upload/files/37629124077.pdfIn PDF document text
    • https://mtmhomeschool4art.com/mycms/uploadedimages/editorUploadedImages/file/mamedefek.pdfIn PDF document text
    • https://kolkatanagariksammelan.org/ckfinder/userfiles/files/kugebulor.pdfIn PDF document text
    • https://inprovitmexico.com/ckfinder/userfiles/files/73474251542.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210907_23ADE1453057E887.pdfIn PDF document text
    • https://eslms.com/userfiles/file/budedakeromasozixez.pdfIn PDF document text
    • http://wawa757.com/uploads/files/43511085654.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/73547786922.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/161305759525af---6764915551.pdfIn PDF document text
    • http://europavloeren.nl/siteimages/file/vipuvisiseleputeri.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16133b7b4e6f7d---konutet.pdfIn PDF document text
    • http://suspensionestg.mx/userfiles/file/nukutaboxugat.pdfIn PDF document text
    • http://buyyoutubecomments.com/ci/userfiles/files/62142029887.pdfIn PDF document text
    • https://currenwatch.myhost360.cn/file/upload/files/09-10-14-14-55-79.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/58193113538.pdfIn PDF document text
    • http://specimport.by/files/files/zosikunozixojuwezixovi.pdfIn PDF document text
    • https://mcsfood.com/images/file/tonuzegawigaxog.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/93690558333.pdfIn PDF document text
    • http://borisovhlebprom.by/var/upload/file/nesulidogogobovutakuzeso.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/xawuxizavaze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=need+for+speed+no+limits+mod+offlinePDF 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_off0000b564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB564 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7B 10472 bytes
SHA-256: 865d23241f96c2c41f33de23a62dd4c9da329e2d67dc796dd4398bed9db1cbd4
font_02_sfnt_off0000e531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE531 15404 bytes
SHA-256: 944db825efe9224724d278eca1367eb3afee1b9320826befede09dd749a52680

Open this report in the interactive analyzer, or submit your own file for analysis.