Malicious PDF — malware analysis report

Static analysis result for SHA-256 714d4c74dc70b629…

MALICIOUS

PDF

89.1 KB Created: 2021-06-25 20:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 8bf815485fc30f5fb161f633c5a6b96d SHA-1: 24c185bd805a4eefb6497229288c8a0c8b5940cb SHA-256: 714d4c74dc70b62929948e2a04c8fef3271d7472b9b44a4e60db52c2a16fcc30
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. ClamAV and an ML classifier flagged this PDF as malicious, specifically as a phishing trojan. The presence of multiple links to potentially compromised CMS uploads suggests an attempt to host malicious content or facilitate phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://eotp.info/sites/default/files/fck/file/kepejomimu.pdf In PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/om0ovr5dhc9m3tua3fbuveq1tt/71493879296.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/gavogejelagiwajo.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608877e0c606e.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/29114442619.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bf7d86d6c---75165628381.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16075437beb953---binujumef.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa1b349b48---ludevekirupopamugofak.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6ef33d024c4ae269ad676d16bfa3ad7e/46885164752.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e45b192ce---bowiso.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9e655d0c6---9057925323.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/64647fee0d324e5c236f96a7b856f702/tawerovopigod.pdfIn PDF document text
    • http://vds-construct.pl/userfiles/file/baveluz.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/c83d0b64f31a80372b9f241323ba1f03/54109249526.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160b22f7f3d76c---90049841020.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/7e7cc17d701c1a268bc69519201cc7d2/64012218245.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/gegegekipamam.pdfIn PDF document text
    • http://kasargod.net/uploads/file/79264150061.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/90f3d07e42e252f94dd62ead921925f1/xonawamemugikini.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078d1da15155---fugexolatitowivadolateto.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/ponulekalivikosifavo.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160c2bc4d770d6---waveraxisuxuwukatot.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/61692058366.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/7b9095c9e3ac920ca6a412262b72300d/loxitomelixuxumudof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=making+a+sundial+with+a+paper+platePDF 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_off0000f8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F1 10824 bytes
SHA-256: ca3c61973454f7fc54a73e82d2cdc956dc43ff1f2f47f8c5fe1c7f6b0333af44
font_01_sfnt_off000111b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C3 17304 bytes
SHA-256: 5cf8b4b4615d7695c2c0d4a3419b3ea45c3ebb8ecfc7432aa9870ae4d05179ce

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