Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee6ed624a17f0793…

MALICIOUS

PDF

99.5 KB Created: 2021-07-08 13:21:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 5c77a23460014de9ae03a469980e0179 SHA-1: a441dec81f6a6234a2ca5bdb4316f7396b1dd2cc SHA-256: ee6ed624a17f07936e503338af1ee5a364b499a2dbe53748e48851c439ccc8b0
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO abuse. No scripts were extracted, but the embedded URLs and link farm structure suggest the primary goal is to redirect users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a65b09ef27c---woxabarasulodibu.pdf In PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdd850c86ad---67712134539.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wovamubumisex.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609245b57c2b8---rulosimotitufiramugoled.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c684a01deff---38659776040.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/0a605d5df469f8328e32c14e585fe98e/gumep.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/omr9qaiuhhjc93md72akepfg37/32552328130.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832d68255ed---25093096003.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1607c519624dfc---xolarozofigujeroleru.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/b9f9d0f7d664e313d714d5b98fbed393/metapinizefinexixiximodom.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/c08jacpsa6kntp70gn6fmufek1/xuvawax.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/90a4d7df678738f22d1ac35a3d1770cd/78010859540.pdfIn PDF document text
    • https://vieclambaohiem24h.com/upload/files/99415838762.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/7v54op5orjc5pv60ruv0401u62/81232383016.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/06577bbc0f124960bf8819cc7d01911c/koporuvibageviwazuf.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/jawuxorilutaral.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f59c99a6f3---gudupibedo.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/sowuzipapotafaz.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/u9f8ff4564af9k0vq8nnkn1kbg/winikedenujepas.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16086a998c85c4---97752673835.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160844cfc6bcb0---8041477554.pdfIn PDF document text
    • http://roughriders66.com/clients/f/fa/fa96273273f04fd2a06feef12b1e4d70/File/sotimexojevovuzojum.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608138262319a---vuvife.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/sitakugebis.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/30251587900.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/40737681603.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=integral+calculus+for+beginners+joseph+edwards+pdfPDF 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_off00011e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E09 11308 bytes
SHA-256: dc01ab56bd5f826f5927bbde137d5b0ec2ab40f6dc501a5ad593ca7d35b54311
font_01_sfnt_off00013823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13823 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15035 18360 bytes
SHA-256: 76b40931e1fa07e95b98362f4caf83183fa5c6ac49d59ef4630872078fe64985

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