Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a49faaf533d680e…

MALICIOUS

PDF

80.5 KB Created: 2021-06-18 19:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 2e8a45fe289c9281df74dda9e8c11f50 SHA-1: 1cdcb18bc058e66a6882458889000eed0eafd57f SHA-256: 7a49faaf533d680e07fc9f29c038b0ab272c561fd5618acaa3dec055c82baa25
164 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms and appear to be part of a link farm designed to attract users searching for software cracks. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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 http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/sv6sr5pqcnmr7c8oc4a1f1rd98/81343890764.pdf In PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608213e744f63---lirezeze.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/anb4ml2jcmkl8110cfq7oqnn1v/fekefozogirujetunasejeniv.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/3649560027.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/243277d51c67f13362c0635119040e7f/xamiroros.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/q7pjoin467mn4ksv8sudfn07up/55329537422.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e58f0d3846---keferakovinonukaratajo.pdfIn PDF document text
    • http://praguetransfer.com/files/file/14509977608.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/gadobolafumofasit.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/db2a00984f5a56c92431ce07591205fd/62721712448.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/40696038258.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/83517537906.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210531_230125.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16087478e3aa3b---73897789739.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/4f824e6e3ac28450feddd1bd720782a0/sikujivisu.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b26bd7a0ff9---nulozegowijamipitewavonib.pdfIn PDF document text
    • http://www.moyekolodin.com/files/69430344826.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9e747a793---4919078243.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/27774389429.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/e88bu2jh8oojg7u3ga5989p15q/91938301463.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=videopad+full+crackPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C9 5000 bytes
SHA-256: 61a36cc0c6071a668f84aa4bb2f3ca1ac5e24e8199121c899a41c37a330841ba
font_01_sfnt_off000103e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E8 19928 bytes
SHA-256: d6f56f5793f4024807161a853dafa4bd4cbd9b3e4e00f1ae1a4bf700247e1ed8