Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6edafb0c16d635…

MALICIOUS

PDF

96.9 KB Created: 2021-06-06 14:37:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab9b1737a6bb397a4b3a6d3458d279ad SHA-1: 450c95329960bf51a5ef5d0c56f9a63a75aaba13 SHA-256: 1f6edafb0c16d63502bdfdb3e90e46fe62857c1855f1be957e167df498197244
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to compromised WordPress sites, designed to trick users into downloading further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure aiming to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7441

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://inwebjor.ru/uplcv?utm_term=el+poder+de+la+mente+subconsciente+pdf+download
    • http://onlineexpert.in/userfiles/file/16566453999.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41ba284b0c---zenozisazopuwubute.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/88281842153.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/mubovixefidepiko.pdf
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/3eda102fc575a91424e577104e25a6e9/jezasiwap.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/q1vv9m4d4p47k3sr9a8g7gjnt4/daboduxutujer.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160891bd01baa8---88242201507.pdf
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/da8e160fcc7df074cbc1dfb1f385130e/51015787038.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882ff248da3---kigawaka.pdf
    • http://ytbozhuo.com/upload/file/010322065625.pdf
    • http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/radubab.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/41d7237f3b9300e047afc255628043b7/fenanubasotunexef.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a6a9ce7ba---vazipibosulunalo.pdf
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607277c106187---fuwamojurajowelep.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986b3c01694---8950831266.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/3c2b081d5fba02477a4ac81670b30c20/89502089433.pdf

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