Malicious PDF — malware analysis report

Static analysis result for SHA-256 e10f969965387393…

MALICIOUS

PDF

84.1 KB Created: 2021-09-21 02:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 05b798d522e58d12cc6bf6df99ec303d SHA-1: 3ee0f5f83ec9c3d3c71138c17295cd72766c8217 SHA-256: e10f969965387393e8cb1c3d05d2624977f912d87c462cb5e4cd0b873187ceb5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a link farm hosted on compromised WordPress sites, designed to redirect users to potentially malicious content. The presence of a download button lure and ClamAV detection as Pdf.Phishing.Trojan further supports a malicious intent. While no scripts were explicitly extracted, the embedded URLs and link farm structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://smidgel.ru/uplcv?utm_term=freedom+android+apk PDF link annotation
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131721e7a013---nizigatipugibuvagifunuwi.pdfIn PDF document text
    • http://blccy.com/userfiles/files/73352947852.pdfIn PDF document text
    • http://bndweb.nl/upload/files/gofisijugebadojodula.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141e0612adcb---91554854535.pdfIn PDF document text
    • http://usateatop.com/_upload/files/62563173268.pdfIn PDF document text
    • http://haithuanphat.com/uploads/files/penaxifolozax.pdfIn PDF document text
    • http://reyazahmad.bscsaoner.in/ckfinder/userfiles/files/jelen.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/volabewadonir.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/momovado.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/27435926359.pdfIn PDF document text
    • http://eot.mn/uploads/userfiles/files/nasisadixipiwebefosup.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613580b9a6282---kejavaxuba.pdfIn PDF document text
    • http://twilaw.com/files/files/rubexipexikizagigina.pdfIn PDF document text
    • https://safecampus.in/cmsCart/upload/file/wazowazuvuso.pdfIn PDF document text
    • https://xedulichhaiphong.vn/images/news/files/97792124658.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/sopeloxumosenilalufe.pdfIn PDF document text
    • http://needychild.org/ckfinder/userfiles/files/85070930285.pdfIn PDF document text
    • http://asja.ua/userfiles/file/91334126556.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/nabeselakasuxowedif.pdfIn PDF document text
    • https://pepsima.biz/files/file/18800596499.pdfIn PDF document text
    • https://afgventuregroup.com/cfiles/file/rurug.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/95556229769.pdfIn PDF document text
    • http://www.leposeur.fr/site/upload/ckfinder/files/43290641396.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/75770928973.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_off0000e561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE561 10308 bytes
SHA-256: 48839ce8a40c7ffce1787ca1ab07cc3bab5e01c737dae784b7088507c10ca817
font_01_sfnt_off0000fc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC78 17936 bytes
SHA-256: e1778d263b1639e0666d868d6b71b7816e2b9afb530f359cbc495fca0254438d
font_02_sfnt_off00012b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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