Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba632133894d2a6b…

MALICIOUS

PDF

78.3 KB Created: 2021-06-18 01:02:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 62a3073dfaeb53f839eb0de672f52d1e SHA-1: d41f1add2a99c2a43573da9439e4532756255097 SHA-256: ba632133894d2a6b9321c6ea1dd576224a082adfaec2c61cef3cf771212fa246
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16082fd8597ab7---wazajeguvuwepasaf.pdf In PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/6bf51a64f0d3f5667a22b62e6bcf3d54/xasilolutezilutexosafeni.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/1bef688bfdbdb32280b26514a8200d4f/xezexagegixiwinekuwunax.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/vivugij.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/557si9onjme8on1tm800ncts71/levidujamunumuwovami.pdfIn PDF document text
    • http://poiskvod.ru/images/file/nasiwipebodenibomaxelen.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/efabedfa897dbe638ec0ffc5922a7dff/napokataniwekonuxawaz.pdfIn PDF document text
    • http://446888.top/userfiles/file/54212946756.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/aa3f9de7e372583b51050f73ee0be397/9652528463.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/171232481812.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/valokov.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/b6a29b7cefb696601fe4b849f10a8a65/ladudiwure.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/9653e7b89cb6510911cfcc8c3218020a/polegazebupote.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdf5a9e868---36868045243.pdfIn PDF document text
    • http://askort.pl/Upload/file/3593740847.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfa009a116---6985705046.pdfIn PDF document text
    • http://grapevinewinerytrail.com/clients/876125/File/wulutuxulimasedorudaw.pdfIn PDF document text
    • http://globeksa.com/ckfinder/userfiles/files/40108051498.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=practical+geometry+class+7+worksheets+with+answersPDF 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://scripts.sil.org/OFLIn 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_off0000dc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC50 5552 bytes
SHA-256: 29b1b9dd75c8e3c969bc9ef92c0ac2748cc0d8aa76d401101b7f93ab9c4017ee
font_01_sfnt_off0000ef24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF24 11604 bytes
SHA-256: ab8cce279175d1e765fe213e903bd55e78d7481b0857a622be59f72e532f24d1
font_02_sfnt_off0001169f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169F 16128 bytes
SHA-256: 214ebb6d76d8bab3cf97f6fe823749b73c4d91a47dc206b8021e936dd6b0c4f2

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