Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4c4e6f1e8a9e972…

MALICIOUS

PDF

96.5 KB Created: 2021-06-29 20:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c7fae7eb8269544db5ad97f1cc4c39bf SHA-1: 55320dc187128fcde8ab2b9f421b2aa0cb3759ce SHA-256: c4c4e6f1e8a9e97236ff4c0d4a9b903c3b13a4bdc050d1c197523759d1839dfe
164 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://laborke.ru/uplcv?utm_term=psd+to+html+template PDF link annotation
    • http://m2m2design.com/userfiles/48471046009.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/bubulako.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/mijibusuwanovinudojif.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160996eab50e89---kudamoluxexi.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160837daa53dd1---perefoda.pdfIn PDF document text
    • http://446888.top/userfiles/file/maxabufuzavigovipewetene.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078993432f2e---moginagubus.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16075e6fd329e1---31983985612.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160869dcc6d62c---89487320713.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/1300f84079d609590d180a3f88895896/jogamagerisarofumela.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/1a6b96b1b82a3111a9243ff03281778c/40834948134.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/48240295340.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/cb69720e7fb67ddbd34b8f3e2b372740/mawetakubika.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/906030ca336892886b3dbf0f417f39d1/84207814564.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/9463391260.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607da3b93b639---nafolasaweg.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/2a829bdf2d27d9aa8520e459dc293574/pubiwokuvifixana.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/5m5nv0leb2gcu7rn2sr84itvg6/dajofobadimonodegigotod.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/69bfc7698efccc50cf552318f725504e/89279722965.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/58499500034.pdfIn PDF document text
    • http://metallpress.info/files/33676693684.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/regojukebiwezogesuzu.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/55c4a9f82de925df2b8cc3c870fbb398/daragavesafosum.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/selowafa.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/zegomegenugufu.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/72104cba4603c69ca54bbd37d3f88341/12997130815.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_off000113bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD1 18096 bytes
SHA-256: 9915f87658d6c8b76e8fc90eb245a04168fc4dfdec3ceca83ebfc986eea6e60c
font_02_sfnt_off00015bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BCE 10360 bytes
SHA-256: c57d801a06ab6260fdf4c009327eaa37299f017163e3a9054104b1ec15793c55

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