Malicious PDF — malware analysis report

Static analysis result for SHA-256 f93ed50a3959f007…

MALICIOUS

PDF

79.0 KB Created: 2021-06-29 04:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: fe0b9c2cf5d2b2f3031488cde05aad5e SHA-1: ce4725cb4b25de1219bf4b5e546b057a9eb25e3d SHA-256: f93ed50a3959f0076a52f6ef6a85ba91ec0a6e9f443bbe4cfdca40e5e4c51656
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm with numerous URLs, many pointing to compromised WordPress sites. The ClamAV detection 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' strongly suggests a phishing or trojan distribution intent. The presence of multiple links on disposable or compromised hosting further supports this malicious purpose.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://sarljarry.fr/userfiles/file/laravuvasomodulug.pdf In PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160700374d0d7f---4382681967.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/kupemasujolavapewaki.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/460d2f3e3a624e891ceb88f06f733f3b/xopig.pdfIn PDF document text
    • http://luberoff.com/userfiles/file/xikapiketafibesufu.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021522847447474.pdfIn PDF document text
    • https://sy-tech.eu/file/29813185021.pdfIn PDF document text
    • https://bevelec.com/bevelec/dossierMois/file/tewubexemutiniwuwo.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/a5bf7f53fb040189f456a8bd991ca044/15054671864.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/74101274675.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a01a6b186---70029449813.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608774a74b8d1---gametefi.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607687e9329b9---nubagopaleleladitu.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/mibozaxapasuzegudunogi.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/bosijinabezagukulu.pdfIn PDF document text
    • http://yearbookplus.com/uploads/ckfinder/files/visiguva.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/18985850839.pdfIn PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/75404481716.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/jokokuzezelakixuxi.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098967427df8---5852981011.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/biram.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/82345616999.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cba2a64191---98454700804.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ceea23bb9---kelerubeduzi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+many+digits+are+there+in+mathematicsPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607871249f146---5165216740.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FA 17580 bytes
SHA-256: c4d0ceeba2c7ac370b561b1f5d41bd5e242bdb4b4c3721cc8456f55c1c7a2d1f
font_01_sfnt_off00011ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECF 10964 bytes
SHA-256: 9a8d35202eae464ff2ecbaf75f0229c73005b8047e89ae4cdd856433eb56fa62