Malicious PDF — malware analysis report

Static analysis result for SHA-256 225db316a2439055…

MALICIOUS

PDF

90.3 KB Created: 2021-06-27 03:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 537a929e05a7884766b408b411929940 SHA-1: aa5c4a1538ad9dbfbd8c67e628d579c06e85cd17 SHA-256: 225db316a24390551900a237cc80dadd4f444a31d1837db3dda2ab0eb1fd6009
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous external links, many of which point to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary function appears to be redirecting users to potentially harmful content via a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/m00hg9fqr8ls8jdfo23hh0b0lt/xenoxanoxo.pdf In PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/tukazuve.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/4c6fbe6d9b98caba1afca3800acffa79/zeteladoveb.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160acac410d7f8---80861732882.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4946cfd13---84453830483.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/72c50c3b09b2c17d114d0c1e0499b64e/gigamejelofenale.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609737e541c9d---wilemamiwobekowalaj.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/fuzelegasu.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/xotitogojuwewerigox.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16080aed88f20c---462363598.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083dc2ce6daf---5220931791.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/13819080762.pdfIn PDF document text
    • http://ashioke.com/images/library/File/topenapinojeguteduwof.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/86810987549.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ddc0da1b2---lesawarozekimubevova.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/7971250f46defac1122059b55ee1beaa/58897102479.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/60029818590.pdfIn PDF document text
    • https://locktactyuma.com/ckfinder/userfiles/files/welozubutugedomufuk.pdfIn PDF document text
    • http://www.kilincsweb.hu/fileok/file/28908377668.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/3017600188.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/hfavf68fdntns7sjvsc6av3hth/norejeliderelipaxizaruzu.pdfIn PDF document text
    • http://nktrading.qa/file/files/80131667667.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3c8904f1d---17053742192.pdfIn PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/11543619887.pdfIn PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/rakakuparutigubew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=east+indiaman+galleon+for+salePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE42 17532 bytes
SHA-256: beed9a18d697e6e17b2dd4f5f8ccb5be04d7a67a4713aacb44b4511fef69222b
font_01_sfnt_off00012b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14379 10680 bytes
SHA-256: c34adcc7870a42365474a114c7f62450e006725378fc6d894c4cce3d821421d4

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