Malicious PDF — malware analysis report

Static analysis result for SHA-256 134e9a172e1db45a…

MALICIOUS

PDF

90.1 KB Created: 2021-07-19 10:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 83b86c3227109528c26456dcab20998b SHA-1: 0beab8d12cadd4b4c1c8d34c7560c5648f495a46 SHA-256: 134e9a172e1db45a9ad31c1ea78620b468891206b4dc1afb154cb49607e150d4
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/jnauj793f1f1k0lqcjmqh1me41/wereguw.pdf In PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c4fc0bc1b---31232675082.pdfIn PDF document text
    • http://headrepublic.pl/images/files/remazanow.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/rujapaki.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f71a59997f---14606021282.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/fffsmb76ifepuf0vgs3snv3r25/84075499317.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16077defd9bf38---39837356832.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/sisupuzivamew.pdfIn PDF document text
    • http://0965818789.com/CKEdit/upload/files/dexemofij.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/c3e3a627a0e10036c8e72d16a3a9d68d/fokoletofuxi.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3117367396---fazezeluxotenegadumigibod.pdfIn PDF document text
    • https://baongochoa.com/upload/file/48176559088.pdfIn PDF document text
    • http://instalater-macecek.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/65028134201.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852d4a0847e---31117339341.pdfIn PDF document text
    • https://ldoris.com/upfile/files/20210717011930.pdfIn PDF document text
    • http://yilip.net/userData/board/file/92446189036.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b08115c2c83---gikefolod.pdfIn PDF document text
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/3c6f2d3f0edb3a006da9c563977c06d5/veweluv.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/0lqi8e37r6it55dj3k5mddpcl5/xutojapebipaj.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/dunibefixatataz.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/gadowafazokesomug.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/2b9f32ddf83f4ee128650225701ce155/lebupuxekowifif.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d937708892---sikoruzetabu.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/minadikewumupulubej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=ome+tv+pc+appPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D8 16648 bytes
SHA-256: 388fe22c28cb2c63ea27785d78f8795141120d13fd7ffae648e47858d1c9f8e4
font_01_sfnt_off0000fff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11807 9996 bytes
SHA-256: dc70a95f3f1d9139ad54ac8b0c610889a1648afe7b0fac70a14b48602b14fa3f
font_03_sfnt_off00012e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E51 17076 bytes
SHA-256: 29d267942daa27df6e069fcbfb1b6cb26e6feffff6422fd94704139ddf47f3f1