Malicious PDF — malware analysis report

Static analysis result for SHA-256 032e417d8d1f4168…

MALICIOUS

PDF

85.1 KB Created: 2021-09-05 09:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c27bb4cf652d8e24447d68bf0bfce769 SHA-1: 3449371c988dd56daa9bf00d40dd4a5a232eeb9e SHA-256: 032e417d8d1f41680ad56e687f502718665ed47bc23dd44695999ef53ccf24fa
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The presence of numerous URLs, many pointing to disposable or compromised hosting, supports the conclusion that this document is designed to redirect users to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://dalton-english.com/userfiles/file/lilebogufo.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/e4qmek1dnmc7nb40ionvk58mhg/muvakozitulewekadir.pdf
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/r2d4regn4l63lra9ien8jpcbg6/83801052138.pdf
    • http://jessicarossitto.com/clients/7/7c/7c16b8c799dae9ffcd1258f31d6ff645/File/38682392554.pdf
    • http://finpacecuador.com/userfiles/file/71615148503.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16073e8bd95317---rebaxewunigalusuj.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607dba2213e72---gimeduzo.pdf
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/48143526894.pdf
    • https://jackinthegymtpe.com/uploads//files/202108080347146337.pdf
    • https://francois-daulte.com/ckfinder/userfiles/files/92307778362.pdf
    • https://12tiga.com/contents//files/nuduzovexodaliduxeveduwaj.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094062ea22fc---37213048765.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/e19d8843bb862ede17cf9d6e274d3739/93274376915.pdf
    • http://fitnessklub-impuls.pl/uploads/assets/file/sapaxozuvujunumut.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9fb48d4fd---73455458030.pdf
    • http://thaisomboonautopart.com/userfiles/files/15499744941.pdf
    • https://eagle-aviation.com/userfiles/files/41999325130.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa50255a55---67168396617.pdf
    • http://dongduong.net/Images_upload/files/tefojepakimovodutumirasi.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/6efd9ebad114547b0cccf1249a21d846/nedoxaxadit.pdf
    • http://bpsstudio.hu/uploads/wikorobokigeni.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098419948b8d---58299599787.pdf
    • https://megatex.ua/images/uploads/file/bimogadatavaxone.pdf
    • http://dentalclinicbangalore.com/uploads/64845072966.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=nj+dmv+written+test+questions+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_off0000e575.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE575 16792 bytes
font_01_sfnt_off0000fd8c.bin
b30051096b97b65e63cfdd6894a16a2ab44e9590eaad72df77c9bff3fe39980d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8C 10956 bytes
font_02_sfnt_off000116b8.bin
a8dd926bb5d562edf2fe263cb8440110cde0c7c9b426695127b97a34ac8f014f
pdf-font-stream PDF embedded font (sfnt) at offset 0x116B8 18520 bytes