Malicious PDF — malware analysis report

Static analysis result for SHA-256 96258029ba2b69e9…

MALICIOUS

PDF

104.8 KB Created: 2021-07-02 06:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 95c3e940e0d24fd333791627c70ef239 SHA-1: f8efca52b51747eec1b8b94c365f2ba0a43ca69b SHA-256: 96258029ba2b69e9774c7769a7016e6e6230df8911994a856de51fd4d677538a
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with malware distribution or SEO poisoning campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9682

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://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c494f7e51b4---51246653563.pdf In PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/fb17d59100105cecf7fadaf03f6285d2/15823417712.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/d386828681cd86a5d977c06ed57c934b/27994334251.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc343ad472---wajonosaxuvudokosidomagu.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/27850015559.pdfIn PDF document text
    • http://rafaelokazakov.com/file/17101079137.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e697ee614d---duleneruki.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/lokevofedibupinelusigimer.pdfIn PDF document text
    • http://vizcsap.hu/files/file/pefonutuxif.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607068f5570ea---melur.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/b69fe53945f50381d55057536d127df5/vedosudif.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/db73a3eeb455b5bdd6385fc4bdd43ee9/bufibakavulone.pdfIn PDF document text
    • http://mesterek.net/tmp/gosamusejezabozo.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8e3950f2c---37244654403.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757a8f0c067---vatewute.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e1d21150e---63648264497.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160862a93b4d66---95858501261.pdfIn PDF document text
    • https://renault-service.com/userfiles/65115635846.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/b04h2kt66tdc0b8jpva7tcd4g0/74472108061.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b6aac289a81---powibipagizad.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/2d8508849a1eac657acfc4d705042487/63402709318.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/2498627750.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160875c8a63063---telesemoja.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9af7804a97---zadimajufevizotobedi.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/81808271772.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/ba6587ae79772be1bcae99655ef93f98/87822609327.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=to+day+current+affairs+in+teluguPDF 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_off00011d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7E 10828 bytes
SHA-256: 6cfc4cc7859bdd8e759a44cad042deb54d6f9b835d8e9632b0f3c5e1f1b6a0ea
font_01_sfnt_off00013669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13669 18144 bytes
SHA-256: fe27661cec3daed0808586c4754f8ef249392f93df343fa408b83e5168b50873
font_02_sfnt_off000165df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165DF 16488 bytes
SHA-256: d0e02ea597b059e12c640018e4c0b859d2fbe31b167f59dc9fd0dc6423c65742
font_03_sfnt_off00017ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1