Malicious PDF — malware analysis report

Static analysis result for SHA-256 feddd02283e1758a…

MALICIOUS

PDF

84.9 KB Created: 2021-06-26 16:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3fd43ba89834fe74437eddc4ccf368b8 SHA-1: efcbe223e6dab9afd1322dc1f100a244fba0e88e SHA-256: feddd02283e1758a63783587b8381d56cc3dd092afd93c6255c1a1b550bc58eb
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, indicative of a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent. The file's structure and numerous links suggest it is designed to lure users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://philabc.ru/uplcv?utm_term=clk+coupe+2000 PDF link annotation
    • http://pogservice.ru/userfiles/file/xesuwojinikofibuxukesaxun.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/90830160876.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160a677d48a83d---79939062569.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/93464881753.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/rozatadalajelogafagebo.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/rekijosukujakezogerivira.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/2e179e3862acce731c02d84032932b60/58568225131.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/99379941256.pdfIn PDF document text
    • http://allasclub.com/campannas/file/76729007560.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8dc2566ce---9589988177.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/9a383ac3c39b568c251613a40cccdc87/bopavuxenumidomofotupuk.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/derizekejojitupafepuzem.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/megesinemutazovudemabedo.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0dae67b939---4299424200.pdfIn PDF document text
    • https://santechnikosdarbai.lt/images/files/rawukojivipebemobaninimo.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/86538485146.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/97532345441.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/61985029018.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/2241524562.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/f13ac899c0c0ce48419aa0e86b3443a4/27218612572.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/c09bjdtetdbtglha2q42ml3otp/29799832130.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/42ce5e3b758e9e9ac6d9d8995b194acb/3534074551.pdfIn PDF document text
    • http://ipublicity.cz/data/file/bawefaviwelaba.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_off0000dca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA2 23384 bytes
SHA-256: 1a8bb22b24b813bd9724a9f3a6be7860d03897cf3fcb0a66991acc4a64a69044
font_01_sfnt_off00011624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11624 10108 bytes
SHA-256: 4465954a6410f283e0485396555003b47de53ad778a7482739d321fd1ed443ea
font_02_sfnt_off00012cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1