Malicious PDF — malware analysis report

Static analysis result for SHA-256 95668c3922a5106c…

MALICIOUS

PDF

85.1 KB Created: 2021-09-01 02:34:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7baab1a3a2dde8e2b41f8f9a5fbeac24 SHA-1: 50ce1766709b3301ab7cf3b47ae2351d7019fa8d SHA-256: 95668c3922a5106cdc82bdd60540bec785fcc89c2623083132e000c6e2038ea5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised or disposable hosting. This suggests the document is designed to redirect users to malicious sites, likely for phishing or to download further malware. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/82170997275.pdf In PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d8233e1fc---xagabetejejedal.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///gajirumupuzajewaxa.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1774d2ce24---pifalaveweravob.pdfIn PDF document text
    • http://rhondachem.com/d/files/45854986100.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/nc7j5oqorqj8v1tcg2k5volvb7/71866469254.pdfIn PDF document text
    • https://bkht.vn/userfiles/file/27410218238.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/7a83befbc50b6f965b67686ef829d1a9/91548505573.pdfIn PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/42017768879.pdfIn PDF document text
    • https://twfern.org/upload/ckfinder_temp/files/20210607004232.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/d2clm22b4oetuh9vcr5hvsta9h/96675810322.pdfIn PDF document text
    • http://battlegrouponline.com/app/webroot/js/ckfinder/userfiles/files/1091226557.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/63259394866.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607386a45445e---zuralovukadarebap.pdfIn PDF document text
    • http://shiksha24.com/userfiles/files/43342129708.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/faa1c44f8c51016c6cbd919e6e7b7207/69834175369.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/66339558040.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/tijiwitewipi.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/fsb65452qta0maji1p2693ifr6/26597543606.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/gudarapaxomigi.pdfIn PDF document text
    • http://namdolove.com/FileData/ckfinder/files/20210706_9F48430D4B45EA85.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/62753683375.pdfIn PDF document text
    • http://regmac.net/userfiles/files/wojudixenewobusibenip.pdfIn PDF document text
    • http://agierresrl.it/userfiles/files/23505590335.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea58672d1f---fawileze.pdfIn PDF document text
    • https://tselectromechanical.com/uploads/CKfiles/files/16619466803.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=equine+sarcoid+typesPDF link annotation
    • 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_off0000e5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BB 10804 bytes
SHA-256: 45880d58c58f7c87d737863dd5b7dc80c2b32db89280e80cd72fb9471de486ac
font_01_sfnt_off0000fe9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AF 18500 bytes
SHA-256: ddb7bc12c41cff316af178ce6fb962d3d8823a1ba8876d46a2e7afe1eb4648cc