Malicious PDF — malware analysis report

Static analysis result for SHA-256 32dc9929e7e17dec…

MALICIOUS

PDF

95.5 KB Created: 2021-07-07 05:26:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 37574321cfe1fd578cb59932190df887 SHA-1: afeb72d8f24bb288a4238f5fd6ee7574c5a7f16f SHA-256: 32dc9929e7e17dec57a107650eae6e7c7872afa41c1aa8dfcebbb9c4d0698a03
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, so the primary attack vector appears to be the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160abe76b5b1ab---tawozatosapuposo.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/207ba77db43fdf810a89b95b36f1b5d7/bunurorisabaviku.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/c00a3f08c02e5d67e5ffee67a41f8703/kusalaxofokozub.pdf
    • http://abroadster.com/files/letajadolemufo.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160869e2367ad0---51252919446.pdf
    • https://armenia4d.com/contents//files/tezam.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f4820d0df---lipulafezarewawagalixu.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f2a400412---1132233089.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2557f24f2---82984250187.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/1d1f1c56bfd5e40419a39c411acf37fd/25644024419.pdf
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160701124ab4af---wakaxo.pdf
    • http://www.ximangsongthao.com.vn/app/webroot/uploads/files/48435560685.pdf
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/18c2523305e57e057fc84805ae528b00/57432682278.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3ea85955c---wenixosu.pdf
    • http://macautemple.com/userfiles/file/41525589515.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/22e96e426cc31e21723e93398b27c78a/nitiradafifowe.pdf
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/o2pr0nu1p28ipvvl52jd8t7hes/libopipudaxifexe.pdf
    • https://mimpishio2.net/contents//files/65915444737.pdf
    • https://harrisitalia.it/uploads/file/41981427398.pdf
    • http://richwoods1969.com/clients/861079/File/bidusenoxagaziniru.pdf
    • http://martom24.pl/martom/userfiles/file/fofekabosejemo.pdf
    • https://wfca-czech.cz/temp/userfiles/files/bameperi.pdf
    • http://dientrotiendathc.com/media/ftp/file/97924370526.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4d8b4c540---81594386943.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=pump+technician+interview+questions+and+answers
    • 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_off00010f2d.bin
4c62d116b186342b2e1142f0decc621f589b0b5cb5af9a4e0141bbc7d51ef3d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2D 11132 bytes
font_01_sfnt_off000128d7.bin
9b512c9926e5a4ec709a881096004b930e8df9cc21f4cb425868f67d9d163d6f
pdf-font-stream PDF embedded font (sfnt) at offset 0x128D7 18248 bytes
font_02_sfnt_off00015858.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15858 16792 bytes