Malicious PDF — malware analysis report

Static analysis result for SHA-256 9de4cfa96386d2cb…

MALICIOUS

PDF

85.0 KB Created: 2021-09-11 02:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 011090cd2af9370bfa3cd18a06f47eaf SHA-1: 608de0eeae41d9cf32f6b33335fb8917af18fb49 SHA-256: 9de4cfa96386d2cb9d79db34b0b84ed575e44d26bec597a3b3a2e4932948bf97
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the nature of the link farm and the PDF format itself often leverage embedded JavaScript for redirection or obfuscation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://laborke.ru/uplcv?utm_term=best+rpg+games+on+phone PDF link annotation
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613602ab2edc9---17342593357.pdfIn PDF document text
    • http://taispacedesign.com/upload/files/69834655644.pdfIn PDF document text
    • https://maria-galland.ru/files/file/35977553471.pdfIn PDF document text
    • http://streathamtaxi.com/survey/userfiles/files/61623701847.pdfIn PDF document text
    • https://sadex.pl/fck/file/74041837424.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/80792395594.pdfIn PDF document text
    • http://coaching-scolaire.net/userfiles/file/53314689397.pdfIn PDF document text
    • https://xeroxexpres.cz/userfiles/file/nukeseredawisilop.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/jojasinawomax.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/14008928835.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/47346747262.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161394d0e8e14f---39332050987.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/nujepiwugesebalapabegi.pdfIn PDF document text
    • https://yoimart.com/upload/file/20210908194700.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/miwuvuvofome.pdfIn PDF document text
    • https://watosaphotography.com/app/webroot/userfiles/files/20210902_174725.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fce170ed6a---sabodixamipax.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/b89255df470b081e3b0da7069914ea53/filomikikulurirovebara.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613bdfb86dd93---metemozatokeveguvo.pdfIn PDF document text
    • http://lobi.md/userfiles/file/2229654961.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/banenoninimobe.pdfIn PDF document text
    • http://sensitiva.fi/UserFiles/File/76098324346.pdfIn PDF document text
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/31593359715.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_off0000e74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF62 10616 bytes
SHA-256: 87b8f63a9b3994ef7e8573843ecaa136082d44064453c6ce97602e6975888d93
font_02_sfnt_off0001177c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177C 18000 bytes
SHA-256: be86b5ab0a00ac627cacb65f08cd82fb5c5dc9d72c6521609f81049345faec4c

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