Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d8c28f74eb38c8…

MALICIOUS

PDF

83.1 KB Created: 2021-09-16 02:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1759ab0dbafb6a39d7f44fee901a2084 SHA-1: 90ee0602ec3f5269b1c28e8349da1b991e68dff9 SHA-256: 47d8c28f74eb38c8ac0b743b8f50e1594a6b790318764c2aa413e5d4276d95f5
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, indicating a link farm designed to redirect users to malicious sites. ClamAV and ML classifiers strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a malicious link aggregation strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/161400e1be6877---nudedabewun.pdf In PDF document text
    • http://sanmorales.es/userfiles/files/xubuxovigemeroribisironi.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/tirejobigivem.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/35289014873.pdfIn PDF document text
    • http://inlovehuahin.com/file_media/file_image/file/vapexen.pdfIn PDF document text
    • http://ccshecea.org/upload/files/54905338224.pdfIn PDF document text
    • https://baongochoa.com/upload/file/13133065049.pdfIn PDF document text
    • https://weldingportal.it/userfiles/file/18819752845.pdfIn PDF document text
    • http://xsjsbzrw.com/uploads/files/22804702889.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/lajemasafawifopafumujixod.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/22807805457.pdfIn PDF document text
    • http://bandbaajabarat.com/ci/userfiles/files/jemovetamuwasupox.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/161308169b71f5---webesi.pdfIn PDF document text
    • https://clinicaalcantara.es/sites/default/files/userfiles/file/dorudap.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/41241366148.pdfIn PDF document text
    • http://cortabellanews.com/userimages/96551025276.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/81110883441.pdfIn PDF document text
    • http://195exim.com/datas/files/razedinesagatebo.pdfIn PDF document text
    • http://historico.uts.edu.co/portal/app/ckfinder/userfiles/files/joxoxipotiwo.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/69178686229.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/karidomurulanedov.pdfIn PDF document text
    • http://daechienglishpark.com/ckfinder/userfiles/files/69299438337.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141f96f0c7d0---9126515713.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=best+site+to+download+action+moviesPDF 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_off0000e023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE023 10636 bytes
SHA-256: dc45444078254331bca2a9b4eee2677a11d19d984ad3af7f2262b1e983dfc22e
font_01_sfnt_off0000f893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF893 17724 bytes
SHA-256: 07bbdfc8fb0d99bcee314bf205b470b4d659599bda335f6e121881d81650c09f
font_02_sfnt_off000126f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1