Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e6036d1349ea07…

MALICIOUS

PDF

88.5 KB Created: 2021-07-30 09:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a6eaf6ce73921f8019395daba56f80e8 SHA-1: 80e313ea8bb43551dcfc83a1f4866b3928840f6b SHA-256: 47e6036d1349ea07901b0da83d1e49dc255f9065a4d0f29c027d64645461efff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://cructi.ru/uplcv?utm_term=english+to+bengali+dictionary+app+download+for+pc PDF link annotation
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/fofalelaruvuk.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab108281c91---ratarib.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/4b4b09f78fc500ccf7da605d90e13870/73605112349.pdfIn PDF document text
    • https://pacie.vn/web/uploads/files/20150634657.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/nugilimabokedonofiwezanab.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca59d56b62---jidasidujelokurezewujon.pdfIn PDF document text
    • http://gmei.lt/ckfinder/userfiles/files/12750313820.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609524e7bfb50---89220141838.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/nukj7b3tj8ngolvav686c1v5pt/zadunudiwovufodad.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/balivinutixugotorita.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/fb5fdaeff669fc094f7421752e0456df/52965756894.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf7d8b83d4f---61417658049.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/zifubuzilugadil.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/silozidepuxakimamodozesup.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/caa65f4ff321ba9041138a54eb0c2bcf/18215740193.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/69ed9e9ec6ed0b100d4cbddb63248012/pegademiv.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/nubpodo99cet2qjvp04pa19h3k/93403714455.pdfIn PDF document text
    • http://attlas.center/userfiles/file/34573724644.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609187f6699c0---xipumetunireseboxila.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2792e7435d---57059436916.pdfIn PDF document text
    • http://yilip.net/userData/board/file/35107542198.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b2eee6a3a---ninerikoli.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/16eefd6051569579ba76b192da9407f8/vogevufumugabelaz.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_off0000f71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71E 11220 bytes
SHA-256: 55a68fd04adf65e51687c41521b749c9ff2861a46fcb0e653b48544a142648df
font_01_sfnt_off000110f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F5 16632 bytes
SHA-256: 1e2c9a8172f4fe38efae3d898854d883d8d33b838fe2380e43ea792aee69cc4c
font_02_sfnt_off00013c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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