Malicious PDF — malware analysis report

Static analysis result for SHA-256 288ddd471ac072a1…

MALICIOUS

PDF

78.0 KB Created: 2021-06-27 05:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 311fc1fb7d183894ec5caa3c3ef8a0ae SHA-1: efa3f7306cd0a304cdc638c551a3147b4288ac91 SHA-256: 288ddd471ac072a1f7fbd2df8a041170ef917ce3b0b35293dd40afb635e6cc68
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as a phishing trojan by ClamAV. It functions as a link farm, directing users to multiple compromised WordPress upload directories and other suspicious domains. The primary purpose appears to be to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4578

Heuristics 5

  • 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
  • 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://inwebjor.ru/uplcv?utm_term=another+word+for+aim PDF link annotation
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/aad7889fe5544194d1554e5b88171536/botopelevokuxegak.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/f3trav7kqd1unm9ugmlos2moj6/55786599523.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/63819753577.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/0a25873edea1686f659c08b561d57f8a/71714878031.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/43kb5v0v9avo5r3nvcspk10tk2/57662664267.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/lovotitizipuma.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072a1ffc360e---19972174115.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/17464293334.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aefc8c4c1be---retezonafituruzajeb.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202106111213462672.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/29k34m1t5c9lmr8ctijqm3o7un/20415559766.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb7009b4a6---98340870457.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210530210820.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/34936842107.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/87170918557.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/de15d7b22c8f00350397a6921112c778/miburopizaporoxiviverabu.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/fceceef58313f72a2def770469ff64a6/dujagenumu.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0f77e0d261b3f90dd43e0f9c8b01361c/gefibofugipofit.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/6g0uh73ivdp34bvt308p86otc0/lajilatosax.pdfIn PDF document text
    • http://cn-polylysine.com/d/files/ruweroxagaxijagotikeja.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b7d12555b---7595651418.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/11928428917.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/motenakorabizifepuguneme.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/d316b1f76dc19cfc6b24ad513e026735/zelizoberetezedadevarunu.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9F 17540 bytes
SHA-256: de37cd7cf1bd52bb56f232d7a007d36af27d23919e67c4034c69ff8194fe549a