Malicious PDF — malware analysis report

Static analysis result for SHA-256 e952006444d65c5f…

MALICIOUS

PDF

68.5 KB Created: 2021-09-29 06:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e0abb35ca1398deb9ae1066931fdd1f9 SHA-1: e01a5abcb173f4b98b0fa27267eadad104e0eba7 SHA-256: e952006444d65c5fc940146709464866b317a8176c9f33011c8c6c8f8035670c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an image overlay with a clickable action, directing users to external URLs hosted on compromised CMS uploads and disposable domains. The document body is heavily obfuscated, preventing analysis of embedded scripts, but the overall structure suggests an attempt to trick users into visiting malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://germainelecocq.it/userfiles/files/32255636971.pdf In PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613e50bd9a33d---14851967485.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/nusisaxutila.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614902574cd22---22829806084.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/duxim.pdfIn PDF document text
    • http://2sisaccount.com/userfiles/files/wizux.pdfIn PDF document text
    • http://cachnhietcacham.vn/Images_upload/files/76590278398.pdfIn PDF document text
    • https://cantarefides.ro/admin/userfiles/file/kotikexuludurirebilez.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/1cc16tco7dg7nto179r4ng0n3u/nozolajabetipiwotugo.pdfIn PDF document text
    • http://home-plast.ru/foto/files/33424061965.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/rifew.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/53812662210.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16134154342aee---poxidet.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/39800015653.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/fotivebewafowaletabulefax.pdfIn PDF document text
    • https://alebusph.centralcms.cloud/galeria/files/8198739816.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/meligigaxunirijonibelut.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/joporibuvekewekuroso.pdfIn PDF document text
    • http://gu-bo.cn/uploads/files/romatugojubidiwebes.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396f3de342e---tekefofatekilarinum.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16135fbb35a5c9---13389802783.pdfIn PDF document text
    • https://rainbowprinter.com/app/webroot/files/file/14208380114.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=free+download+store+for+androidPDF 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_off0000b0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A7 10408 bytes
SHA-256: 16b427b899832d030e52f18e55241efaddc00a71aa5def6171cc9563b55c256a
font_01_sfnt_off0000c85b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85B 14216 bytes
SHA-256: 58454762dddad917b6a57307bad72e1fc97dbddcaf49c68588501afd23a2a420
font_02_sfnt_off0000ec30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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