Malicious PDF — malware analysis report

Static analysis result for SHA-256 42319348d27def98…

MALICIOUS

PDF

67.9 KB Created: 2021-09-24 07:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 19809d3aa1aff4815b87bf866c05ad71 SHA-1: 67ddf2edd84ba8879e178a67b82361027c0111e9 SHA-256: 42319348d27def980bb19dd8c6cefb57447e71ef2c71dc0d236c30c2cd54a637
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. Several embedded URLs point to websites, including those hosted on compromised CMS platforms, suggesting an attempt to lure users to malicious content or phishing sites. The document body appears to be malformed or truncated, providing no direct user-facing content to analyze.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6614

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 https://drafthe.ru/uplcv?utm_term=grand+theft+auto+san+andreas+for+pc PDF link annotation
    • http://franceplus.fr/userfiles/file/86305332484.pdfIn PDF document text
    • https://smlstripedbass.com/home/rock/public_html/ckfinder/userfiles/files/xaxijabadulifu.pdfIn PDF document text
    • http://tiendanatacion.com/noticias/files/sabiv.pdfIn PDF document text
    • https://mk-promotions.com/ckfinder/userfiles/files/fidisezorixerutefobob.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/xivepadid.pdfIn PDF document text
    • http://lineshare.net/upload/files/20210911060135.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/56265667616.pdfIn PDF document text
    • http://slabowidzacy.smprzemysl.pl/ckfinder/userfiles/files/nivumisolasuwizum.pdfIn PDF document text
    • http://regcureguide.com/files/files/78076220796.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/ftqfce8u7ki5cg665j1tivekr1/makujomenirekofa.pdfIn PDF document text
    • https://maychieuvinh.vn/upload/files/tizinexufasojunede.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/67317094255.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/vosolokol.pdfIn PDF document text
    • http://ablerexthailand.com/userfiles/files/3739715709.pdfIn PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/nugazezufojuminurud.pdfIn PDF document text
    • https://www.ijestr.com/ckfinder/userfiles/files/89766434832.pdfIn PDF document text
    • https://resicolor.com/upload/files/tefipusulewonisune.pdfIn PDF document text
    • http://vansuloi.com/uploads/userfiles/file/15277176202.pdfIn PDF document text
    • https://newcar-rental.com/uploads/files/202109161743222388.pdfIn PDF document text
    • http://sibinetweek.ru/userfiles/file/85029480106.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/2233169e2a358d7fab6971d6fec7b586/juvebegelapadurazuzaz.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614047145da25---borefasijiboderelosin.pdfIn PDF document text
    • http://sipsak.nl/userfiles/file/wojorokun.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385927d1426---govimubadira.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D1 17916 bytes
SHA-256: 176ffa6445b61614babb3a17d10174f1dd10fe169fcc5d81e45e94ce41266db1

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