Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9b9ed70bbe7a9ae…

MALICIOUS

PDF

87.0 KB Created: 2021-09-06 19:01:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c4424ecbdf0d3acfa0b0d5f5f81e43e9 SHA-1: d168cddbff70ec66c5af8f16a756905af43e8756 SHA-256: f9b9ed70bbe7a9aed99a2dfff4b859483504941c5946b7f534388216791b424d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are structured as a link farm. This suggests the document's primary purpose is to act as a lure, redirecting users to external sites for further malicious activity. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • 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://xnkvinatimex.com/uploads/files/33569301817.pdf In PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1612cc6194d7b4---sozenazokojufovitabatom.pdfIn PDF document text
    • http://zonwering-belgie.be/ckfinder/userfiles/files/kinodufapibibun.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/kaxubivosesenorusominiro.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/sunalifiwifuti.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cfe787b17---mijar.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/bceecb8cb5b8eef61b530bc949e7c30c/pudobizitarimapad.pdfIn PDF document text
    • https://jasz-pap.hu/UserFiles/file/temurorap.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16076b81bb152d---73687681256.pdfIn PDF document text
    • https://kubermatkaplay.com/ckfinder/userfiles/files/7750536968.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b9100cb667c---kemolenorexugiwuvopeluw.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/9b4n0sa92qsge21roro7lhlkfh/junozusijiwezewuxaduno.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/togbf8uf8gqs5m41ma15vq6lcl/kiluverivavodabisipedep.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/eb975dd77254b4319a17aae5792e643d/62994361031.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610950b6f10ca---suvus.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/4d480d28cacb489d207257fc772aadfb/86000890649.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/nozegipadatuxuzerixa.pdfIn PDF document text
    • https://jvlegacyhomerepairsmd.com/nbloom/fckuploads/file/jabetefuvikirexitejes.pdfIn PDF document text
    • http://kasargod.net/uploads/file/984014575.pdfIn PDF document text
    • http://maraulsan.com/ckfinder/userfiles/files/61460897580.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/pamoxejovebebu.pdfIn PDF document text
    • https://redaelzaqaziqy.com/userfiles/file/namewadonafijojefozituk.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610aa14625c79---97686022536.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=blackstar+ht5r+mkii+manualPDF 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_off0000ee3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3E 10624 bytes
SHA-256: 8645fe340b8b420261f938fc3fb262a37b12ebae37f14685c853decedb01ef50
font_01_sfnt_off00010669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10669 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7B 18432 bytes
SHA-256: 8abb22803dd07a72621bf5913053629606eabf7fa0f8a788b850adb269711150

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