Malicious PDF — malware analysis report

Static analysis result for SHA-256 676e07b4b42116ee…

MALICIOUS

PDF

86.6 KB Created: 2021-07-17 15:53:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3c7aa9d058857349fee4be430b3adb19 SHA-1: 721cfeba7835fe727e31efb9e72bc204cf89e432 SHA-256: 676e07b4b42116ee320a4a5e5e11ce0ccf3cfc6fff08adb33f6d0fe0193a0428
156 Risk Score

Malware Insights

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

The PDF document contains a large number of links, many pointing to compromised WordPress sites, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738ca64876d---93128002096.pdf In PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/64q0flfc4n6jgum6fjoiclk5k0/37410432449.pdfIn PDF document text
    • http://ore-processing.ru/d/files/debobowewasup.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/b0855f456ff1320860d199d377502a61/83883959605.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c3a1d4522---70688357577.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609be3712b7a6---sajifuzejenawadixiwu.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f1bf3e9be---44165909117.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021051907515783.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae52cd16952---zabosivaropuda.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b15fe048ab---giwuvinagutofaziribomu.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/65876914639.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/latitetezumipotibilogato.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/19703080256.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/41878601631.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/kuxoguzixitekiludu.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0283885b3---lelafat.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/63971215147.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/e1afa1506f0acceeaab54961c4ae8796/47121619199.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/fb4216f7cd3c5a659687d72df472dc5b/waxivarewupamijesofawip.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/qv0t6upqhml5kakmoeld36m1mi/modozun.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609004cb666db---67537320062.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/divikajipipuraxowuw.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/vajilotipara.pdfIn PDF document text
    • https://jjpremiers.com/files/57057156746.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804b485cab7---detizerizam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=twisted+my+knee+and+now+it+hurts+to+bend+itPDF 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_off0000ebdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDB 17448 bytes
SHA-256: 51ade16b07cc6a3874ffe7c97c7a09346128e315482e443e41251fa2b7e50cf8
font_01_sfnt_off00011960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11960 10960 bytes
SHA-256: 95c807f9a34fcdac9cd15193660d4b2340aff009d222f10c9528e8ecc7ebf824
font_02_sfnt_off000132b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1