Malicious PDF — malware analysis report

Static analysis result for SHA-256 f74de754442c3d3c…

MALICIOUS

PDF

84.5 KB Created: 2021-09-11 18:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 772b3f9078b57d121f4cbae5e5fe0d15 SHA-1: ac29579dc8b4def9cd00fa6f67e331036124c4a0 SHA-256: f74de754442c3d3c155915e32b22c221641283503485a4b9f1558b973555ba9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is heavily obfuscated and unreadable, providing no direct user-facing content to analyze.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://travelone.ae/userfiles/files/kagonixikatufanagixud.pdf In PDF document text
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/kafoguzitumunuvilox.pdfIn PDF document text
    • http://mothertheresapublicschool.com/userfiles/file/15601571230.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/75554087946.pdfIn PDF document text
    • https://quanghuydulich.vn/img_duhoc/files/xirubokudetatenekama.pdfIn PDF document text
    • https://windsbs.biz/files/file/45838082447.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/88605559576.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/65420916680.pdfIn PDF document text
    • http://star-transform-moscow.ru/uimg/files/8664957274.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/99494559479.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/161300bb703f88---49711367464.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/65739948805.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16135cb31eb4fe---gakixumaj.pdfIn PDF document text
    • https://alpinashop.bg/files/76974916095.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/49110307918.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0dafd205c---77815354753.pdfIn PDF document text
    • http://nirmalamathachurch.org/cms_uploads/image/file/wivisegobaliponojumovim.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/77cd7d6a591a7a978da7a6e538fe523e/zarujibel.pdfIn PDF document text
    • https://indirimlipin.com/calisma2/files/uploads/67644436235.pdfIn PDF document text
    • http://taihegas.com/filespath/files/20210904053406.pdfIn PDF document text
    • http://ciaomamma.hu/editor_up/sogake.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/zulutikidaf.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac504b744b---7502363360.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/16630407445.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=dual+boot+ubuntu+windows+8PDF 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_off0000e26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA83 10544 bytes
SHA-256: d5dc3b0477a19ebb52b5071b0917e0245dad596594c34980416066a0cf3bbd51
font_02_sfnt_off000112af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AF 18704 bytes
SHA-256: a7d4e4fc8ca93f59c62835badddef11e1d42b5f40860438fd7320c7593935ce0