Malicious PDF — malware analysis report

Static analysis result for SHA-256 f77a2a852765be1a…

MALICIOUS

PDF

45.6 KB Created: 2021-09-08 09:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 18cd37bee9104f620bde0965bda1d677 SHA-1: cd0da30c829dd2d9c506d6c5955d49521f047c53 SHA-256: f77a2a852765be1a25a4d00496b77422cd62e829bdb81e51eb83c91aa29a79fe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or scam campaign. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this. While no scripts were explicitly extracted, the nature of the links and the detection indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7407

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://philabc.ru/uplcv?utm_term=obra+el+enfermo+imaginario+pdf PDF link annotation
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0fbe3a1aa8---varunugabinu.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/7d4a31c730e7e773c82b08983237424c/68197585698.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/4a7092e0a7b28bdb25a2c907d99bd995/pesatafiwuwok.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/21727895202.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/vubigexefijatagira.pdfIn PDF document text
    • http://davidhammerstein.org/ckfinder/userfiles/files/96061342596.pdfIn PDF document text
    • http://moawin.org/editorfiles/userfiles/files/pukosanofekopezadik.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/48585966585.pdfIn PDF document text
    • http://aligokdemir.com/resimler/files/89351861269.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/d0349c344aa27d668eb1ee2158b562a4/ratidivegigifun.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac65861632a---zirusitonaveguwikufugi.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/89961430102.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/delakemazupakifadidu.pdfIn PDF document text
    • http://rosg.net/sa_upload/userfiles/file/20210719204236.pdfIn PDF document text
    • http://massimobertoarchitetto.com/userfiles/files/xufod.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac908bcb4fc---64483745924.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/88622069877.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/dd77ad89e2ed74b8ac874453128ebc6e/pivogudikuwi.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f17340c09d---rutifukulewufogasa.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/0a84b6a9c039a40626994a4543baf4d1/66560687016.pdfIn PDF document text
    • http://transchem-tech.com/Uploadfiles/files/95833708237.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3fd6095b5c---11139685518.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/60323812924.pdfIn PDF document text

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