Malicious PDF — malware analysis report

Static analysis result for SHA-256 447dc29e55b6ee31…

MALICIOUS

PDF

91.1 KB Created: 2021-07-14 03:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1eda08da5e1fc97367a30727a3713aef SHA-1: 1da7a0d897d6432d9a4f5f07bae0d66ba51aacd8 SHA-256: 447dc29e55b6ee31bf6b5b59337c5f1e75a25045d05c0e0bd5282b6e6a94a6ee
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript, which is often used to redirect users to malicious websites. The PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicate that the document contains numerous links pointing to compromised or disposable hosting, suggesting a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d494856e6da---tuges.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb563745e3---84613888014.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d32288b8d1---89922983584.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/44137ada14ead2cb8bdb63310438afe1/zovepusatafuj.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/sunojozikizutijosupurib.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/23bbe4f347358c94f0fe72ee9a6a08d7/24763513982.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072c14e17dbe---sabujopu.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/tavubejamo.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/kejokibipuraxez.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e7f4d30db---notuzu.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16092eb9cb0996---80891180344.pdfIn PDF document text
    • http://nawaress.com/webroot/js/ckfinder/userfiles/files/90020947542.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc85edd915---filerizokakelotomero.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/gazajejutesunofegeforog.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/mibujavebitidelakexe.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1fb4facd36---zibozuxazikabatu.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160986bd4289d9---tovuzefolotiwopowonez.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/ab3c50fdc5475c879e3f50af21741fe0/nadaker.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/o2soka42cq6qanvl23jtvlgthi/5263643688.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/23113333156.pdfIn PDF document text
    • http://mim2010.ru/userfiles/file/sosiporidinexila.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073fea72c1a7---45376299856.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/88392277439.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/8d2bdbf488575788ab6b46dd1b889f58/53347033798.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/tumajiva.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/motadefovavofasuviv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=thoughts+are+things+pdf+bob+proctorPDF 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_off000100ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CA 17696 bytes
SHA-256: deef2f7dff3795bb19beb713c54482b4280773cc300dbe60b7b7352a17305667
font_01_sfnt_off00012e25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001463c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1463C 11056 bytes
SHA-256: 506d918ffcd7d024d60101ddbf982e5c57cd7d470ed27c6e7e0a858eb89d0ad3

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