Malicious PDF — malware analysis report

Static analysis result for SHA-256 06eb2be0ee4675b4…

MALICIOUS

PDF

89.6 KB Created: 2021-06-30 12:36:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 1c451b0d7c6ca68a1c36871070d7b01f SHA-1: 7074d9363e5df2330d7777612ac59dfff0e349cf SHA-256: 06eb2be0ee4675b4f49a78a1e11af29e5e70e4ddb0472f27c06c1b1ca3051cdf
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 compromised WordPress sites or 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 delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://huntic.ru/uplcv?utm_term=how+to+answer+why+should+i+hire+you+with+no+experience PDF link annotation
    • http://busankid.com/webfiles/board/file///xabuterulimobonekeliriba.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210626155148_1379423428.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/ec1de413c1d112be2899acf2c0f60d63/4563717820.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/nqvdc9qpqvbanp96b7mesiv6r5/96267816287.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160addd2cc0f4f---46328026000.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607218ef58487---80914819298.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/lgabje3338qt2a7jsit3u9f8ta/8357823687.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160849724700c0---20001768771.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3d35b6037---58301754889.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/0b7a450cb93d14705e1b356eae9180f5/34736715404.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/balurikumikegij.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a77228b216---21533523590.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/dcgjl9njffvvqtihvjbl6br3n1/86055365049.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/wivivazamenotaso.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d541653d22---xefereseb.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/bafupawi.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/85566385370.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087120d9473a---62292313303.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/1419201584.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/30n5mac5h2r9cedtt45vhjoq8t/99074006220.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/roxezokerimisu.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_off0000f847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF847 11004 bytes
SHA-256: efedb2d6e8eac28cfd4b9b31bce71a5ec190a668b5394d20000618b603e635d2
font_01_sfnt_off000111d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D6 17184 bytes
SHA-256: f199694becc2e78321acac905e158e8ff0b5ad58071974b18fe974ed44dbc831
font_02_sfnt_off00013ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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