Malicious PDF — malware analysis report

Static analysis result for SHA-256 324d2f3feb523930…

MALICIOUS

PDF

72.7 KB Created: 2021-09-03 23:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ff1913f9c360e7192244e19a25441547 SHA-1: 2db7ef58c7375aea6355a7ad522eb0e1de118469 SHA-256: 324d2f3feb523930931f3d4b87b31c2f431736ef46493992e689e13d7e4e8e08
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV, which identified it as a phishing trojan. The file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting it functions as a link farm. These links are likely intended to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pixomot.ru/uplcv?utm_term=jph+political+science+class+12+pdf+download PDF link annotation
    • http://galsabino.it/userfiles/files/sabuzutoraweke.pdfIn PDF document text
    • https://novzelandiya.ru/ckfinder/userfiles/files/31040397745.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/eba68b52003dcd4badadc2256d503a1c/zigivobesofiwuz.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210510160805.pdfIn PDF document text
    • http://mkbeauty.vn/luutru/files/50946118746.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/81337593973.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1612e1aa87e3c2---23208220648.pdfIn PDF document text
    • https://vadihosting.com/calisma2/files/uploads/gefubuvukizukotovineb.pdfIn PDF document text
    • https://e-midas.ro/files/file/82092658065.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160909a4995855---vemijazolaromevibulodax.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160df98d9f0f1d---wogalomujusewuz.pdfIn PDF document text
    • http://bookblog.kr/data/file//files/bewumu.pdfIn PDF document text
    • https://mollis.rs//files/60762801857.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a52839127e3---39872508929.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/69335025537.pdfIn PDF document text
    • https://lasanisports.com/files/29242289356.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/18722702852.pdfIn PDF document text
    • http://sshs1962.info/clients/3/33/33dcd814b32da85629335a95ab3d0158/File/nenumonawugakosojifevaviw.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131964c01362---40655346924.pdfIn PDF document text
    • http://maradonasalud.com.ar/ckeditor/ckfinder/userfiles/files/kotidodonavapabaxid.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/watezeteti.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/niwawesajidukefajijowuzi.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a578bd97cc---40568089168.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/e8869aa73f30d44cf21cd76e89b9fa5e/21587659455.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_off0000b930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB930 16332 bytes
SHA-256: 66621f2d8ea57968786c3cb302ea46adcd6ecabd9916586c078a32f7f2205b5a
font_01_sfnt_off0000e3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBF 10864 bytes
SHA-256: 1656751ed8914979adb76f003a750f528bb1f76a355b68d9223c0e13a8e4987a

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