Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaea904b038227ca…

MALICIOUS

PDF

71.0 KB Created: 2021-09-09 10:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4bee7fee2abc170ae13de6a7ac222135 SHA-1: 0d880097bb7fb0df0c0776e400421256b6ae0da5 SHA-256: eaea904b038227ca8a884cc757da93ab16a87c4abc6fae3b3f458a13e1556382
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised websites, indicating a link farm designed to redirect users. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm its malicious nature, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://pistant.ru/uplcv?utm_term=ghd+sports+apk+file PDF link annotation
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea078ac4a7---zovelitagigizesolukonev.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/25866450726.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/65675006930.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/192bb7b9249c9d02fc3cacb959443084/bojovofuxe.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/zosesaxonuwesufijixu.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/c4ec09157684aba5b46633f29c9a5211/47218612680.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/20827491201.pdfIn PDF document text
    • http://rlangkhan.com/upload/userfiles/files/64838871264.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/5fn2k5dfb14q5gefkqnbcgitk0/75507865654.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/5328566043.pdfIn PDF document text
    • http://taispacedesign.com/upload/files/77511992641.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364b680bb62---fabemoverase.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134eb3476244---vezegimebavuxi.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/jowerozolakur.pdfIn PDF document text
    • http://haozuowenwang.com/imagefiles/file/32246156075.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161357c318040f---40357064322.pdfIn PDF document text
    • https://icnj.net/ckeditor/ckfinder/userfiles/files/jaxitapulelosexuzusera.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/968129ee5139729bc044c939075190f5/zegurapepes.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16138f18c62f6c---51632809394.pdfIn PDF document text
    • http://dga.gr/ILC/img/file/20918312161.pdfIn PDF document text
    • https://eventaipei.com/upload/files/fofet.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136bb26d1500---putofev.pdfIn PDF document text
    • http://saktigroup.in/uploads/91323768166.pdfIn PDF document text
    • http://sun-apartments.pl/data/pages/tulafajetagiberirasex.pdfIn PDF document text
    • 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_off0000b4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D9 15712 bytes
SHA-256: 0e0e38382a744d7b963d6050b988c4938de4b6031560903be4918ff6e90c9bcc
font_01_sfnt_off0000dcab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAB 10624 bytes
SHA-256: 677a637436cbfa9a493ff26d49a5d328e7ed1f2d6c8519bb8c3ddb95192d76e2
font_02_sfnt_off0000f51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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