Malicious PDF — malware analysis report

Static analysis result for SHA-256 003c5b54811a8833…

MALICIOUS

PDF

89.6 KB Created: 2021-06-28 21:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 908ed1cebf24d79e3f6eeb0acc5251ca SHA-1: 3860c5d5d16c657cf323ec54ffebcddacaa8ed0f SHA-256: 003c5b54811a88332e13c57245692b31ddbb926d2ca0e57147c7c901e0118b93
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites. The presence of multiple external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://garglob.ru/uplcv?utm_term=i+miss+you+in+tamil
    • https://bancodevida.com/bancodevida/admin/images/image/file/16800092952.pdf
    • http://busankid.com/webfiles/board/file///vewuvawodebezoxepidejunuw.pdf
    • https://kermanrooz.com/img/files/63699969315.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16076a9b5b9ea1---61779691591.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948f25b87de---47799424051.pdf
    • https://avgdesign.com/userfiles/file/9598726281.pdf
    • https://aartipalette.com/userfiles/file/47695332449.pdf
    • http://uhli-janmaria.cz/userfiles/file/92714220214.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/0633b96c5cacd44a0a2bf9c93d6c14b8/katikobopomip.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078a2210def0---72978520776.pdf
    • http://anhbanglaw.com/userfiles/file/59006004812.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/4tji4v4dl75j37gk1sc3gp5nim/4277245617.pdf
    • http://polletnv.be/uploads/files/58749385790.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5624caab73---ganix.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/30m2ieo8hse0ari6ptgf72v690/18915441082.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/kmtbtahvgs25l99jvrpiuq84ke/71671651098.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3c798ef46---lujevuj.pdf
    • http://naturallabs.de/userfiles/file/2498901856.pdf
    • http://thedewakohchang.com/image/upload/File/etodoparajuwaboran.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/b400f34b405e2d6676dc3d83c86d6bcd/90959546062.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086cbeb18147---rifovodabalipig.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1eaeb95596---94278704894.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc88c70fd9---jilopesoxuvivositewobit.pdf
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/1475d542c186f020d573db4fcfc5c227/gudoderamut.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa6a.bin
738f6b3e6a088a610c6858fd2495954c2d9d76b4bdcbafad4756af7bd67bce0b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6A 10200 bytes
font_01_sfnt_off00011144.bin
158aec836b2d03a1814f95797f6c634031cbc52fb68069068db93a0531670a3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11144 17804 bytes
font_02_sfnt_off00013fda.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FDA 16792 bytes