Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe76f60f9872f132…

MALICIOUS

PDF

136.4 KB Created: 2021-08-03 01:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 190673a5f21a21a9432dab74cceaa1d3 SHA-1: b1d3a3e53e4a79d1d29bcb73a430651b048860d5 SHA-256: fe76f60f9872f132c3d44334fbd21319b03ff8f5fb15df6e424f1b5f4e14f6b4
156 Risk Score

Malware Insights

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

The file was detected by multiple heuristics and a machine learning classifier as malicious. It contains numerous links pointing to compromised websites, specifically leveraging WordPress upload vulnerabilities. The presence of these links suggests an attempt to redirect users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fd591f4fc---51567334246.pdf In PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/dbk1rl3ot0uadk4hh8il30h32g/fizemebokafinolaro.pdfIn PDF document text
    • http://pressvaluation.net/userfiles/file/76182581353.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/mesodutowikidaforutoj.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4233cbd96c---xamipe.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/rarupu.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/xubuvizuj.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c86b1d1185---5845252123.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/14600363862.pdfIn PDF document text
    • https://pecsikult.hu/files/file/75320891611.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/bidotamivobok.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/14068456989.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/jimodikomenuxatu.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdd67506d5---10568182976.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/305a9bda834362b00f0d617dcc0e0294/81799524427.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/satufld1a5drt1k1n3fau2ocg3/xituvarawiliki.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8eaf5d039---luwogitodeboliresosa.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/xudopatobijowizemi.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160817149a6f23---muxaj.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f571ab9dbe---wovalazasugemera.pdfIn PDF document text
    • https://congthuonghotel.vn/app/webroot/files/images/pages/files/45812301701.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b947499345f---98321599081.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=who+is+leo+crow+in+minority+reportPDF 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_off0001b27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B27C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001ca93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA93 10668 bytes
SHA-256: 93f960edbc3c0ea58f9c453ae813699e0a285c06b7cb93accab2dc65cc29f0cd
font_02_sfnt_off0001e2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E2E9 18444 bytes
SHA-256: d4cf5aea6825225dc117ed2b638110e3de8826db4247443abdf116929face51a

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