Malicious PDF — malware analysis report

Static analysis result for SHA-256 e922891fe6178a8a…

MALICIOUS

PDF

79.3 KB Created: 2021-09-06 21:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2fc19fc40dde0fc0014ebddbf0c58316 SHA-1: c4c95006172e2be34809ff380e4d2930d3772ce3 SHA-256: e922891fe6178a8a929abde889301061154c23a00a74259a8a201fc07cf78fa0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous URLs, many hosted on compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://drafthe.ru/uplcv?utm_term=sri+maha+bhagavatam+in+telugu+pdf+free+download PDF link annotation
    • https://braindevelopmentmaps.org/userfiles/files/tixabuvowu.pdfIn PDF document text
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/srge7u3evhbqdslcjktmnaepgf/zobugefikewewofu.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/a3a2d0cd4ac5a59a3632acda3f8d5809/19110021274.pdfIn PDF document text
    • http://refpecsbelvaros.hu/kepek/files/428863524.pdfIn PDF document text
    • https://leuphuotcamap.com/uploads/image/files/wijematagagitizomutino.pdfIn PDF document text
    • https://e-tta.com/app/webroot/userfiles/files/vafukulamo.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080ad48e749a---25649595334.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//tagorodiraperagaxun.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/33202340220.pdfIn PDF document text
    • https://chungcungoaigiao.net/uploads/files/77909679651.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/40339110880.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a29b8c8ce32---tizepobifadabimoxefij.pdfIn PDF document text
    • http://e3edu.vn/public/ckfinder/core/connector/php/connector.phppublic/uploadsfiles/xavupopixunudafuxaxezem.pdfIn PDF document text
    • http://dges.in/userfiles/file/pesogekazomexejabewirimo.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/21411380682.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/92527691630.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4a99c7149---18374538326.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/e5295a26b7aade4778eca0325f8e8e91/70786051493.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/7abcf74b5417e26f9faf26172cbe7107/koteroxuragosilunoxezofiz.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093a11e055b9---4142877341.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/b01dca5da2bbdf72e9dfd926f0afcb2b/kekefajaduris.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/af06cabae04270b5d5ee7528c62dd2fc/36089384917.pdfIn PDF document text
    • http://clasesholandes.com/userfiles/file/kevilibe.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/movetifikagefa.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607d29e87b663---nizabodepoxafok.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_off0000ce89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A0 11244 bytes
SHA-256: e3a1f210abf9b1c4e8616c1537a857d5b82e603fb2dfc5d3e2320e14369cad2e
font_02_sfnt_off00010066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10066 17820 bytes
SHA-256: 3aa714bef924a060f12667ba14843041983c246a67d46c132b57e93247d5e671

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