Malicious PDF — malware analysis report

Static analysis result for SHA-256 b289542c72007491…

MALICIOUS

PDF

49.5 KB Created: 2021-09-04 03:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bff3827bf3bf8988c316c4a31922174e SHA-1: 3f6f3651caf0bbf2908956612a5abe542d50b427 SHA-256: b289542c720074918e5fc3fb87359a12b27ad205ff960b154789698094226838
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier flagging strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable, but the heuristic findings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6901

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/bb7b6309db1e3862ae599c2cfe8789a7/69605415090.pdf In PDF document text
    • http://yildizteknikelektrik.net/resimler/files/51097222525.pdfIn PDF document text
    • http://websteravelandscaping.com/editorData/file/67515779332.pdfIn PDF document text
    • http://dominopark.pl/public/upload/ckfinder//userfiles/files/57914632494.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/3eebefda772c2322d05aa1842243ea26/9880875803.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/dd340962027e533362d516c7cdaffeb1/11164192673.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a9aca9236b1181a16a2fa0ad54c1756f/mudurasipodelev.pdfIn PDF document text
    • http://fd-health.com/upload/ckeditor/files/balaneweno.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/kupunajinipa.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/manibodupimuja.pdfIn PDF document text
    • http://espwireless.net/uploads/file/60095767847.pdfIn PDF document text
    • https://asztromiskolc.hu/ckfinder/userfiles/files/lutudeduruduburosa.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/57673741675.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/gopuzifanesugibi.pdfIn PDF document text
    • https://permargi.com/files/galeria/files/99680057865.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents/files/zajexesogis.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/f1b09f75a88a837cda2870be605a449b/gidirufonelijosixapu.pdfIn PDF document text
    • http://doer-sh.com/Uploadfiles/files/15918920088.pdfIn PDF document text
    • http://gchsclassof1970reunion.com/clients/6/6a/6a45fbe13d63dbb0eb8070d7cb9dbc89/File/56342368934.pdfIn PDF document text
    • http://irollee.com/userfiles/file/bubomatuzazinaguneg.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/xikodedinavikepagena.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/42628160250.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160850053b20a1---gugozujugojanarij.pdfIn PDF document text
    • http://ministerium.pt/files/jusejubadupadixixi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=liqui+moly+calendar+2018+pdfPDF link annotation

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Open this report in the interactive analyzer, or submit your own file for analysis.