Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0562bf47632291d…

MALICIOUS

PDF

79.9 KB Created: 2021-09-03 14:34:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1be185414e44b0b929c4044595dbc0f2 SHA-1: 25772249f0ad5cfd14f90304481bc8f086f5b538 SHA-256: d0562bf47632291dfd0ab40810e22d6b3fb4f9f61641f5fdf2ee83201bdebcb3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating it's likely a phishing or trojan delivery mechanism. The PDF contains numerous links pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to distribute further malicious content. The presence of external URIs and a link farm heuristic strongly supports a phishing or malware distribution attack pattern.

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 https://medvor.ru/uplcv?utm_term=excel+vba+worksheetfunction+match+not+found PDF link annotation
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2c3c85ff0---dumoxewe.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/bepil.pdfIn PDF document text
    • http://abwva.com/uploads/files/44220320439.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/wemanojalofoluxonadite.pdfIn PDF document text
    • http://softtox.pl/new/userfiles/file/34478251390.pdfIn PDF document text
    • http://charivne.info/images/file/kemagoxirasiz.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/28524957323.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/10131690054.pdfIn PDF document text
    • https://plasy.com/uploads/file/53885181547.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e90e75ed2de---fuvagapidirokij.pdfIn PDF document text
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/80450263083.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca5537a5e7---45631237005.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/mha20vt1o4a9civetkov476lb6/33046777354.pdfIn PDF document text
    • https://rachelrom.com/rescontent/file/foravukolazakuvu.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/6df53345b798679e5e00268efdd0b2d0/13184506320.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/161239d417935a---18935979324.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/61721497922.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/24066900910.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/60886861296.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0975ca0417---joworobivazawum.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c605dbef0---44156641708.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/wagapigutawegu.pdfIn PDF document text
    • 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_off0000cefd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70F 17844 bytes
SHA-256: bceab2cc95c654a412aab071ccdb8a910d46226ce5f861a989e26d5155b9f997
font_02_sfnt_off0001160f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160F 11308 bytes
SHA-256: 4fc883eb54c391f7b2e95e7bfb841233ed38a65c5f2bd8b185fd1d87eed74a0b

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