Malicious PDF — malware analysis report

Static analysis result for SHA-256 8620e6cbc7675738…

MALICIOUS

PDF

81.6 KB Created: 2021-07-13 17:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: a1f7d555544ac8953f26dccd77fb6313 SHA-1: 734075c93af3c3c488db88c05e52a21dcc0ca60e SHA-256: 8620e6cbc767573866bd5af5f673ec537b6718ae8d19993595c733714bf6f06f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of numerous distinct hosts and the use of 'utm_term' parameters indicate a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/4l94vca7osquo454mq1fa3a5l5/21500999223.pdf In PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/5de9aff303aba63897e7f3f2a0ce1804/wewabudavuvazojizojifo.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/e8d9bf40efc8fb8969d65f29e3c093f7/pegididobi.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f9610ef9e---30825756172.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/8f79a3932baec07ba293a7ed4303a63b/vogirotisonuzo.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/falerapunepelimojed.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/86878233341.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/57974325541.pdfIn PDF document text
    • https://telenovella-bg.com/files/jubepes.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b64f6c18663---18275772260.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/ln9msh0jvj9ge3f6uaru7jjk18/tigog.pdfIn PDF document text
    • https://chptravel.ir/data/file/1413334012.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/2e19e264e07e48dc36cbe8ffc35cc9e8/xamak.pdfIn PDF document text
    • http://studiotecnicobergamaschi.it/userfiles/files/61676514741.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/melasudejifejof.pdfIn PDF document text
    • http://richfield1962.com/clients/4/47/47516dc9824f3897220912ef171c404f/File/sasevilade.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/mivodazutarat.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608798e4558e4---42171593880.pdfIn PDF document text
    • http://mahlkoenig.nl/app/webroot/files/userfiles/files/50242122949.pdfIn PDF document text
    • http://shreyaghoshal.com/konadnew/userfiles/file/mulidifowigamukutivarovo.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc0b57fdd9---rusezevotajezurudunajaxe.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb7e9ed8b2---zabizumavasosogijusadut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=onset+and+rime+word+listPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EC 10520 bytes
SHA-256: 8f8f645e01af1fd276142fed2e13437b0ade1cf94b2a1210fe51ed6b52a12418
font_02_sfnt_off00010cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF0 17084 bytes
SHA-256: 226c1969784cbc2dc81bd916e66c9aa5f731aa966b941598263409173387a0a5

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