Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e0003fb38d3ef0…

MALICIOUS

PDF

67.6 KB Created: 2021-10-01 00:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: c98a3ca2d5c2b7a7a77ad581a2bdd7f7 SHA-1: 10421cc3bf495d714e41a320b7c2607efa4def2b SHA-256: d3e0003fb38d3ef06a855cb0dffdb28ee05d3c4cf899898a4d93923d926cc5fb
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, suggesting a link farm designed to redirect users to potentially malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://huntic.ru/uplcv?utm_term=pokemon+gold+rom+german PDF link annotation
    • https://iasvn.org/Images_upload/files/kekitakoxemijezomowova.pdfIn PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/51368590223.pdfIn PDF document text
    • http://roseeskin.com/userfiles/file/20210924140357.pdfIn PDF document text
    • http://hbisan.com/userfiles/file/7062357625.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161386c5b714ae---sebufisam.pdfIn PDF document text
    • https://ww150003.linebot.net/upfile/files/20210903212416.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/63681413725.pdfIn PDF document text
    • http://parilka.by/var/upload/file/23984372799.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613282da2739a---ponejatojasasusadoven.pdfIn PDF document text
    • http://limoride.net/gallery/file/dilen.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/24446944363.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/vesag.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/17485293516134ebd0dcef3.pdfIn PDF document text
    • http://chetaomaynganhnhua.com/uploads/files/nizimuribikoj.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/51616196853.pdfIn PDF document text
    • http://salt17.com/userfiles/files/mutejevipuwipuwali.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///8067515486.pdfIn PDF document text
    • http://jodhpurheritagewalk.com/images/file/24198674065.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f0de0cd28c---49986581837.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/45478217025.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f02f656585---tuzebigurogebu.pdfIn PDF document text
    • https://auditorescr.com/ckfinder/userfiles/files/bojesufulunujumudejinum.pdfIn PDF document text
    • http://envigest.cz/upload/file/99603997165.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_off0000adbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D3 10324 bytes
SHA-256: b1219dd0efd9b493fa23b90e045c7751a53f9fa4769fcbbcd2e0bbe5b1809bf6
font_02_sfnt_off0000dcd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD8 14528 bytes
SHA-256: d19e5578a6abdf0530ec6002fb414c2b7ee62ff73d051a6ab8ee4e6e29742da2