Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0650503b63a853…

MALICIOUS

PDF

82.9 KB Created: 2021-09-01 02:14:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 22e90bf3d339c7d480631c8485928eb5 SHA-1: 85b6ceac90b5db56dd0d0078794a2d04abf5f4a2 SHA-256: 2a0650503b63a853684f486049bb98ef6a803b5fcd91b8c45c91a7d7069243f0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The document contains an embedded JavaScript stream and numerous URLs pointing to compromised WordPress sites, suggesting it's part of a phishing or malware distribution campaign. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e23ba33eb---devunuwejebunivibovek.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de10bf1704---wugijidasukibafovisumuk.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160898b36dd0f1---41893610600.pdf
    • https://brs.jo/userfiles/files/30291832117.pdf
    • http://zulassungsdienst4you.de/bilder/file/61164784663.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e482dd0242d---57432649985.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/46216ec0e6070f08fd26d942526aafec/51550703973.pdf
    • http://gernano.eu/gfx/userfiles/files/xisegofuzivagozego.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1e1c91694---31766828525.pdf
    • http://ecohost.ru/pics/images/file/72968749439.pdf
    • http://conservativista.com/js/ckfinder/userfiles/files/46766104354.pdf
    • http://studiorinaldibedin.eu/userfiles/files/77426924079.pdf
    • https://www.psk.com.au/application/third_party/ckfinder/userfiles/files/27885966950.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160aa658c74263---dabukuxobexovuwo.pdf
    • http://tantos.jp/js/upload/files/midepif.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160749f5462221---10792984470.pdf
    • https://smartech.lv/sites/smartech/uploads/documents/files/35819168154.pdf
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/58f49af5eb71d8b221afef9021d80b6e/lakusufodire.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/b89bc3fb1dbcdea3b12050ff36c2bf30/bilaronorik.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/b1f50c57c7f26e3ff83d8309be9f2ca7/fixorukasokidugilagux.pdf
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/dazalefunivudusobodogoz.pdf
    • http://mamam.by/upload/File/file/45313488419.pdf
    • https://premiersuli.hu/files/files/52909657176.pdf
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/e7878364b94db82c4379d62758297103/verufuvozima.pdf
    • http://wanyuantemple.tw/userfiles/file/divakipobavalaxolimufo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=research+methods+in+applied+linguistics+farhady+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da97.bin
042c176dd99f4fe3b9a1163fed12c8e603463b4c314a21b3abcec551303bd76a
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA97 11324 bytes
font_01_sfnt_off0000f4e2.bin
8ff2b9149734e529cdb9a8070167495569755d949c40e42682f710cf2b12500e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E2 18416 bytes
font_02_sfnt_off0001254f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1254F 16792 bytes