Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b3c17268307cd0…

MALICIOUS

PDF

165.5 KB Created: 2021-09-07 13:18:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 410a9100f34202c7a7303ccaf733f0f5 SHA-1: fe7d0be5b8b9c759ad6977cc0e43874e1aa54d19 SHA-256: 30b3c17268307cd066d75758e15040ddc96447eb26c815c1c94c6e50e65cc350
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress upload directories, suggesting a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads. No scripts were extracted, but the PDF structure itself is designed to lure users to external, potentially compromised, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • 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
  • 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://queure.ru/uplcv?utm_term=disciplines+of+a+godly+man+study+guide+pdf PDF link annotation
    • http://cmtdental.com/upload/ckimg/files/53550739627.pdfIn PDF document text
    • http://weforyou.it/userfiles/files/vuguve.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce8dc1356c---73584733512.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb603a9314---jimovugejutalajonupipe.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160760548a937a---1636322139.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/90821907353.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff7728f787---91255062314.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160722afa9e2a9---saxobituwiwisuso.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/82e9df5a0ff68f55940dec0e1b21149c/87405112942.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/buzexe.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/mijamuwosilevapanoj.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/juwuli.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/pitogexi.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/memipogafasibetisirigike.pdfIn PDF document text
    • http://abwnickersonplaza.com/uploads/files/mamok.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7655bff8a---60059485358.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/wepuxidajugelob.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/dopifa.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb0d5997d8---64112315829.pdfIn PDF document text
    • https://minhvuongthuphap.com/upload/ck/files/bubetok.pdfIn PDF document text
    • https://voyageaventurenepal.com/upload/files/kamum.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/97925090ee4614430eb470d8407ff403/wizorijudulekulutepikepef.pdfIn PDF document text
    • http://everintelconsulting.com/upload/file/202108051943532513.pdfIn PDF document text
    • 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_off0002224a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2224A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00023a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23A61 11076 bytes
SHA-256: 3287e09d2a9f70838a06007ee4b575e5af08444219862690b48304da642a3faf
font_02_sfnt_off00025405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25405 20116 bytes
SHA-256: 6a732812f9c7ec5b06f62cad3668476998b94e53dad7e2c5eeadae34adb7790f