Malicious PDF — malware analysis report

Static analysis result for SHA-256 025459b4da9661b4…

MALICIOUS

PDF

79.0 KB Created: 2021-09-05 09:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b0007c65307a28cce6ced1cb0e10cecf SHA-1: f7879864562686ba768ba604f49218a012d1fca5 SHA-256: 025459b4da9661b44817a311c98d6f4abbc566736c759d9fc1883a0234f2260e
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, directing users to multiple compromised websites and disposable hosting domains. The primary goal appears to be redirecting users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4210

Heuristics 5

  • 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
  • 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://sicilyontable.it/userfiles/files/59648766838.pdf In PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093fdaca4fcb---89493949773.pdfIn PDF document text
    • https://searchlink.org/userfiles//file/sezeburorofizaditew.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/5af7d4da6cc8ded156764e5a5e6f2d59/vobederodesiratus.pdfIn PDF document text
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/55851495430.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/083d8fbd819e853f61a2abbd11dd764a/madofeso.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bef3ccaeb7a---fulotifobewa.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16133e9a73dc45---faluvojejudewopakajisopax.pdfIn PDF document text
    • http://hsi-international.com/ckfinder/userfiles/files/jabuxekan.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/51f711c89046d8544578c813222df678/7185754355.pdfIn PDF document text
    • http://mansiya.com/uploadfile/files/zedobajega.pdfIn PDF document text
    • http://nature-revive.org/files/file/kivetunijopajixu.pdfIn PDF document text
    • http://kimura-shihoshoshi.com/userfiles/file/10686451087.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/mogexupimozewusew.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/nurulafoxidepedenobasizi.pdfIn PDF document text
    • http://csc-020.com/userfiles/file/20210722060829_rhs0fc.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/c91c87fa480b8380489a92398a601516/bevuribenazijotolu.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd2d46b9f4---27638967459.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/729dc96effe2072312d96c3c305b6e8c/59654800544.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/87933002931.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/7f76d7de0f6c836771d0b701da678c27/fawifijijatuk.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/11871259013.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/73506825744.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=surface+chemistry+notes+pdf+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8A 11260 bytes
SHA-256: 8911121948087fe8ee3b9d74f320f81f0003410e34edb2ac4b7e68a53c47ff04
font_01_sfnt_off000105de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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