Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b995f638da87e2…

MALICIOUS

PDF

73.7 KB Created: 2021-08-28 09:33:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 971dee9b8d92621b2c1d67045d28259d SHA-1: b3e56cdc1d2ce4cf17f43304e2f1bedefd3460fe SHA-256: e0b995f638da87e27e0c6274049e2f513b0a59214e9140b2d5651a311e7cf270
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 WordPress upload directories and other potentially untrusted domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3d541cb56---38828556998.pdf In PDF document text
    • https://vetamblj.si/ckfinder/userfiles/files/99412650683.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/lemoliwoziwuvide.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/2d29752267b86ea69c59a261015a4716/69583595219.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/vibegijakojipuxofup.pdfIn PDF document text
    • https://avflash.nl/upload/files/41663114962.pdfIn PDF document text
    • http://klpa.net/userData/board/file/82038388711.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3d91c480c---86386274509.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/kugizenegonakuleden.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f5e836c43---nupimejopekisof.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/61910113531.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/57572405695.pdfIn PDF document text
    • http://movitecnic.fr/ressource/site-image/files/39981799247.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b108474c791---wegefuxol.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/gapaviwagudegojuparuxev.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/q2cd5m1m1sm8459rs4dsokknkk/3882571190.pdfIn PDF document text
    • https://fasaac.org/temp//files/77992306816.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5375c744e9---tipivikuwavavuwaluwo.pdfIn PDF document text
    • http://capriololaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/savel.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/toligudegadisabavime.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=style+of+bangsPDF 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_off0000c031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC031 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD843 15816 bytes
SHA-256: 8cced8fca58b73ef9534abc21a4a8d2d83f8ab53054d8ec499e222f1dc13152d
font_02_sfnt_off000100e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E9 10528 bytes
SHA-256: e7a9b99eb7882b4ec423d0859b46ea78cbc7261afebb0ada1738c0feb8c40848