Malicious PDF — malware analysis report

Static analysis result for SHA-256 703dcb86a3f7797f…

MALICIOUS

PDF

89.7 KB Created: 2021-08-01 00:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e52d38daba64af67d0c67a081853b165 SHA-1: 84a5b172039e806b4fa562d079a56592b2e09fc3 SHA-256: 703dcb86a3f7797f45c452c4a0ebde10b62cf1bcd1d862072848613b0e412d36
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. The presence of numerous links to potentially compromised WordPress sites and disposable hosting, combined with the 'Password-protected archive handoff' heuristic, strongly suggests an attempt to trick users into downloading a password-protected payload. While no scripts were directly extracted, the document's structure and URL patterns are consistent with malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://nomylo.ru/uplcv?utm_term=gta+san+andreas+lite+apk+%2B+datos+obb PDF link annotation
    • https://oteaexpert.fr/cite_imgs/file/raragesopanelowasanujeb.pdfIn PDF document text
    • http://prestizhstroycompany.ru/SITE/files/editor/file/52812772767.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/9f6ddc12bf4a5343b594591623350b88/gofinomapererupubibuxe.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca639cb666---97146458479.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608905df7db65---pufasalujekipisawo.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/71239933802.pdfIn PDF document text
    • http://architettotoma.it/userfiles/files/supokovotafepiwas.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb95c16ca1---22412081828.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/5f5907766da0c7826657d0dd2e5fd8db/37938121647.pdfIn PDF document text
    • https://506hlapeta.com/files/file/89775980322.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/qm87mk4rigu7fsokm7vnce2e07/wapekipezalowalasuvugiwok.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/bofpjg6ltgp2o32odusjq6g9l9/tedonigafolibuje.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160f2c7434051d---19511413617.pdfIn PDF document text
    • http://designerhouse.ru/upload/files/1985762067.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/363bd7c4e2e0e35e275b1b95cb8e6f11/mejeg.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/710ac869cd0ad10534a8c302c2bceaba/xewavik.pdfIn PDF document text
    • http://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/000fedd2054c1d199bce82ced3c98f50/saxiporilejajuruzemapejem.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/ruxufodarolozovef.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/4848905ae21afc7b52fbefa910ee7805/9804065739.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/32574647214.pdfIn PDF document text
    • http://nhs1968.com/clients/65482/File/zorokebovibeboxibofaris.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/hrt3nkmcdtsr1tlprf6ukro44l/64734170793.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9c153d9f9---zaxafajoz.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/lomasutimupo.pdfIn PDF document text
    • https://paperland.bg/uploads/file/77446745218.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///xoboparoj.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_off0000fc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11466 16872 bytes
SHA-256: 50d03c6f53bf772e97620253a07b87ba56efc15d00b45ca9dd4b372ecf21a894
font_02_sfnt_off00014075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14075 10656 bytes
SHA-256: 38c32418cffb2ef496bfb7be510218ae4c34899caaf378c242808abbbe7a27af

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