Malicious PDF — malware analysis report

Static analysis result for SHA-256 7592fb5f4d08113e…

MALICIOUS

PDF

89.2 KB Created: 2021-09-04 14:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 26883682d05dd3174224388fe87acdb1 SHA-1: 770dea4daf7a27608e8f170c010ba6d5290eda00 SHA-256: 7592fb5f4d08113e9d07aa63a2cc04396364211a6d7a0159f4930edb26304e91
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 domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the URL structure and heuristic firings are sufficient for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://sun-eko.eu/files/file/nometulalato.pdf In PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16085a8e9dde57---70105097776.pdfIn PDF document text
    • https://pacie.vn/web/uploads/files/62569256872.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775cb0c6daf---79091875708.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/54666b2e234b0389577e13ee39ed6ece/tijiwizo.pdfIn PDF document text
    • https://xetnghiemadndanang.com/upload/userfiles/files/temevatonib.pdfIn PDF document text
    • http://thrifthelp.com/flash/thrifthelp.com/file/zefetuxatuzuda.pdfIn PDF document text
    • http://prabashproperties.com/ckfinder/userfiles/files/gosupivovimo.pdfIn PDF document text
    • https://ce-mi.pl/uploads/userfiles/files/70712913645.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/d181bda2ab1a3e945390435c2f36726c/95643502643.pdfIn PDF document text
    • https://digireg.se/upload/zogojejofufaxiloviv.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/jatosigobeled.pdfIn PDF document text
    • https://habrit.tw/ckfinder/userfiles/files/83627476427.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/fuxaluwuxodor.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0707096001628707499.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5582c1514f---63497624419.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/boxodusibaxekidiwirife.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/42789546473.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aff9eb32db4---nadusukaluvififakeporigef.pdfIn PDF document text
    • http://vesimport.ru/userfiles/file/17001291792.pdfIn PDF document text
    • http://hidropro.hu/upload/woxuparamubuk.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/vewewe.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16123c6628c19d---367953992.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=past+simple+and+past+continuous+british+council+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91D 20316 bytes
SHA-256: 16e5716eae325b987005587ee97ee19fabd2fa8a9ff7d05f1d7484a1aa9c822e
font_01_sfnt_off00010ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126BA 11128 bytes
SHA-256: e895aabe8c0f542968db8c8cec7dd01425170a6fcb032cd9725428c788930370
font_03_sfnt_off00014035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14035 16324 bytes
SHA-256: e02f7a2c62afe0e867be0da5a6f2f525b9ab3943161d924a42da68a9fbd817a8

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