Malicious PDF — malware analysis report

Static analysis result for SHA-256 17d0ba59bfec80ed…

MALICIOUS

PDF

89.5 KB Created: 2021-08-29 03:49:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fab67e34c30b0b8802ca7b2e46283215 SHA-1: 3291aa2c23e52c233f7b6ef4a3620efc0f6c0b85 SHA-256: 17d0ba59bfec80edeaa543438278fa4c069398cef1202b7eba43ff89f52ce493
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many of which point to compromised WordPress installations. These URLs are likely used to host phishing pages or further malicious content, serving as a link farm to distribute malware or trick users into revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://synerhu.ru/uplcv?utm_term=multi+step+cutting+for+long+hair PDF link annotation
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3c4339d39---parodoji.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e52bce7bb---43007164711.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/kibodiravevekidazepolama.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/57825536707.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/90aff1603e994a25451962844dba5941/jijelijisufazida.pdfIn PDF document text
    • http://cuacuonnhanh.vn/Images_upload/files/43117362840.pdfIn PDF document text
    • https://latework.cz/soubory/77355461890.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160fc2c83de4a1---79261561344.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/novesela.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/32c3a4c58795788aabf293d202324d99/38239796620.pdfIn PDF document text
    • https://actor-conseil.com/files/file/sudobazi.pdfIn PDF document text
    • https://actor-conseil.com/files/file/5011271038.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/lasiwenasawem.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160f414982905f---75352809230.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/zenurixotofidasatobazox.pdfIn PDF document text
    • http://splogservice.ru/content/file/kapibatixinu.pdfIn PDF document text
    • http://www.insight-assessment.com/ckfinder/userfiles/files/pawuwugiduvaxiwigobef.pdfIn PDF document text
    • https://samyenngochoang.com/wp-content/plugins/super-forms/uploads/php/files/p9fs1fv7m8ev1k83sri9scsn06/67103436056.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210519111208.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8477d4ca5---47749843248.pdfIn PDF document text
    • http://radiofarsasch.online/upload/files/mesisusogivukirozoposa.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/45c47c25a82b9625cc2ce3016295874b/44450958786.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_off0000f719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF719 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F30 10852 bytes
SHA-256: ff93a952e2d592b6db1be02920bc20be50ad84bb5a4567d8cc69a98fc273612d
font_02_sfnt_off0001283c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1283C 18340 bytes
SHA-256: a74e1123f6f2f46b1a885ccbe6e666885f596829ef002e27438cc2af629d8581

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