Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc21ec4a73519558…

MALICIOUS

PDF

79.0 KB Created: 2021-09-07 10:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ec80b36cbb5000187f5c2f6fb00f2938 SHA-1: 34e84d452076c93adb1851ac8c645d69d25edb4c SHA-256: cc21ec4a7351955893d7b3c6b613d30a314d0f28ad986dacc470875d779ce173
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://crysiq.ru/uplcv?utm_term=accuphase+e650+manual PDF link annotation
    • https://charterboatdeliverance.com/uploads/files/nemix.pdfIn PDF document text
    • http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/80215576526.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/ec86b792fb75b9045fee2f8fce2d427c/57055395579.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/wazinew.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086860c640b4---31692247214.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/a0c19abcc78b4154102e0455b531d119/51921503529.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aeaffa9545d---xamanemudesapuzoxe.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/85565313467.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/fuvemawekano.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2214f2fe7---kezanomotibigipu.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/62276210459.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136d38a95c55---lodotoroge.pdfIn PDF document text
    • http://hpmcfamilyreunion1968.com/clients/83891/File/zugufegipefufobin.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/316fd3c8a923286bdb1948c8c2c55ea6/jigakimolijogo.pdfIn PDF document text
    • http://centralwestwoodclassof1983.com/clients/c/cd/cd4b3c89dd1500142a52f05b9125c350/File/48862206838.pdfIn PDF document text
    • http://generale-bureautique.fr/gdb/files/file/gexituz.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/19894729614.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/xopurumuxopavomi.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4702a174b7---zeredowenokezov.pdfIn PDF document text
    • http://keletunderground.hu/images/uploaded_pics/file/wajedebemibuvuge.pdfIn PDF document text
    • https://onderhoudnlgarantie.nl/upload/file/65656864300.pdfIn PDF document text
    • http://granitemountainranch.net/userimages/42718604533.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_off0000cc67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC67 18804 bytes
SHA-256: 98d6b923588ce4859b14a32e46e0c586c8aa4fc92182a6945e04e0bfb446fa9a
font_01_sfnt_off0000fde8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FF 10736 bytes
SHA-256: a30cc40f4754fd5e58b3faa0dc584a38b431fa3fa336b9f8b9f28f0475ee120e

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