Malicious PDF — malware analysis report

Static analysis result for SHA-256 2174a46fd3fc29cb…

MALICIOUS

PDF

97.4 KB Created: 2021-08-23 15:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: a4ee05f9f914e3a7c92c7682ffc123a5 SHA-1: d65650ac2f4022fbfe9f44b2090b5aeb38632df8 SHA-256: 2174a46fd3fc29cbd29d157dd8d048b434e1a443ff539b0a3dddcf6d420bc4ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to numerous compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The PDF's structure and embedded links indicate it's designed to redirect users to external, potentially harmful, URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://allytemp.ru/uplcv?utm_term=definition+for+unethical PDF link annotation
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096135ad9659---gobopa.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/d43400b2b5d93d012dde02f58eb975bc/79529708753.pdfIn PDF document text
    • https://0924055971.com/uploads/files/202108170236564124.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/b840bb3ff6dd6cd606d96f756207a1eb/24187741842.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073be7ec1ebb---14005114867.pdfIn PDF document text
    • http://kientrucsangtrong.com/plus/files/45663502684.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609edb581d082---gexatebiwagelafad.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/bhil3dvhsh871cbql9rq2stjhp/60105046133.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/ripozawezetopotolajawobu.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/7763180a718676477536ad7a122acfba/zopesiwobitasovebo.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/bfee15432fed8410d3a8ff3099da666d/jaforabawoke.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/40355133798.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/29fa9104d8f1024f3cb6eab926b05a41/fugorazabawoxiwozem.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078deb881e0a---babuvugamafolano.pdfIn PDF document text
    • https://dobski.pl/userfiles/file/fusobeg.pdfIn PDF document text
    • http://proxkimya.com/resimler/files/66178088018.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/wuredefinorazajituwikof.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a97d5b3f91---3336868390.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160af2fb581385---18213649203.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/38310912862.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/76104408600.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/68247900310.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00010487.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10487 17008 bytes
SHA-256: 948db48318de7adc9665b97afb5894bf1111c7081d0d9b04087eb7fd51de56a4
font_00_sfnt_off0000ed32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED32 10364 bytes
SHA-256: c808bbdcd549440e974144f4a4a6f23c115277097d625dd0e0cd4eacd5b2d781
font_02_sfnt_off00011d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001358b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1358B 19916 bytes
SHA-256: 6315b2a83f7b0c9d61af6d391929ae7766b2f9378371411eb9e37ea2f988fb42
font_04_sfnt_off00016744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16744 3460 bytes
SHA-256: f0d91821400a9b15c37df07a11e657a4a38fb40bb3cd4e67d9e26c0f5b22f47e

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