Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae7ba6a6d97d6d20…

MALICIOUS

PDF

88.3 KB Created: 2021-07-16 10:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 68aa89e1c5543f2d98cb3a0f2865c686 SHA-1: 24103e949e9bfa470e56ac77097564158fe0701d SHA-256: ae7ba6a6d97d6d2059b0b428d1a2c90660c7a14b3908f4e85eea7914f8a3191a
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and other potentially malicious domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

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://pepinieramontana.ro/ckfinder/userfiles/files/misiditogewisa.pdf In PDF document text
    • http://www.swaving-stalinrichting.nl/ckfinder/userfiles/files/91165876739.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608f18eb58032---86920132937.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071a0b8abaa1---nobolujixidonotanexomij.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/fusaseximuz.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f6f607af4---dadesigagobibatotu.pdfIn PDF document text
    • http://wirheiraten.de/images/file/63058409917.pdfIn PDF document text
    • http://euro520.net/userfiles/file/1621113571119834843.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/02862c6af72ecd422bc5d69bf1abe475/papif.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609cccec79b44---61800813282.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/218u9qpvsal2r9tr497llko6h6/458078479.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d86db52bfd---nufirubenokelifofi.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/zerijelojasale.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/c86c112d6a54035fd33d28d4609e3221/48232847526.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/4150101229.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/272256246498.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/mofafubitupajoziz.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/52604564070.pdfIn PDF document text
    • https://armenia4d.com/contents//files/kasewigaliremuvobewom.pdfIn PDF document text
    • http://cl-pub.com/files/files/bepiduxemuvotow.pdfIn PDF document text
    • https://istanajpdua.com/contents//files/bimewovijudaroj.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609c73f1f2302---jivef.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/ea3a2629159973c3c2d9278f2fbba8b9/mitimun.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef3f9a36a7---34515206908.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/96ced6e760bc80aecd25111fabdb84a0/woxoxuwopemonemopasemotor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=to+all+the+boys+i+loved+before+storyPDF 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_off0000f607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF607 10628 bytes
SHA-256: d28ea3172cf3004d5ebfb894647f1b7748c397f5c0808d9ec1d205fcf2ab6e80
font_01_sfnt_off00010e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001269b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1269B 17392 bytes
SHA-256: 48f8f8efb8f1793f99a26fa4466635309ad2a36a25a060c058eea2b6a1090dbd