Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ccd4e4c281323a7…

MALICIOUS

PDF

86.1 KB Created: 2021-09-02 18:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e5119b5b70ce271014391e08bf31c78b SHA-1: be8384b6e59b7d42afef42b9813637c60547f582 SHA-256: 6ccd4e4c281323a7f90b524644148ead4bca59186134a47e7ddd13870f83e356
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to lure users to malicious sites. ClamAV and ML classifiers strongly indicate malicious intent, consistent with phishing or malware distribution via a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://pc75.net/upfiles/file/1624736684.pdf In PDF document text
    • http://www.proyecpapel.es/ckfinder/userfiles/files/87079737618.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/d3c9c7055d7808cc829c92c58ab35335/fatikitigug.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607177f9e35d5---dejedato.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/96108490643.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/e63bf7ee57abf642749a8c6b0828bd34/41408693026.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160873f2ca367d---bemonavebokagubapalamo.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/xuvotu.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/51b9bf5ff2ca7bfee0897773f14030b4/ragelibafovikikokisopo.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eed5a5b595---94241342933.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents//files/wufekixunar.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610274177f6ab---9944835049.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/86182601762.pdfIn PDF document text
    • http://prabashproperties.com/ckfinder/userfiles/files/retalutobixavefana.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zonalotu.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/mifevojisifudeb.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/36ff2c046d34b20738b23d5c6bd77d36/bifeli.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/fezesoxizar.pdfIn PDF document text
    • http://gamaxmotor.cz/data/dokumenty/92084264412.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/9c23e58294b9eb712d860afcf148d13b/71955884960.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/xalasudinorazorufolupa.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/kizejowovew.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/mbb1ehk09ksk86uoosevs0cvr0/32990982584.pdfIn PDF document text
    • http://fulns.com/uploadfile/fckedit/file/1628877108DuMs.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=mapa+geologico+de+argentina+pdfPDF 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_off0000e6e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E7 10620 bytes
SHA-256: 4f6b25d0ac5f8175a58fdfbf8e5ce359043204f5ac20130c6d1982981ddb717e
font_01_sfnt_off0000ff11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11723 20156 bytes
SHA-256: 3c401aa0c4ac86b8385b9b4cc0e7e2668df0b47ef2c2e440a342ea6b92145be5

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