Malicious PDF — malware analysis report

Static analysis result for SHA-256 e92cec98872bb10e…

MALICIOUS

PDF

79.0 KB Created: 2021-09-04 08:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9ba5d8ac02d10e613fc32af15751018d SHA-1: 6c44b4e0fd8a7d0a5aab3f2dbb055855e52a77c6 SHA-256: e92cec98872bb10e4da11fd1a5b9deda2a640dfad8e7c63dde2fcfee1472a6df
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, indicating a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of many external URLs suggests an attempt to redirect the user to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crysiq.ru/uplcv?utm_term=saxophone+quartet+music+free+pdf PDF link annotation
    • http://aminotp.com/upload/files/bipotawogofinutusatobifu.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/30768828805.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/folonowefitu.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/73749825752.pdfIn PDF document text
    • https://asken.as/bilder/file/54475706859.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/xunerevik.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/zopirexox.pdfIn PDF document text
    • http://klm-co.ru/foto/ck/files/duxezixebejagere.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b41a334cc5---wizavojazuzatex.pdfIn PDF document text
    • http://agarimo.com/archivos/archivos/10155400499.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/b1ed95cf6249820d2769c91edf38ee37/kojow.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1610038e0640a9---pusivijuvuxogukixet.pdfIn PDF document text
    • http://studiosantese.eu/userfiles/files/21264997654.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/444725c7adb54e8b90457418de9fce9b/pinikirogasopapos.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/dc529b746e2a369a7419f08158277061/jasavopiludif.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609dadd1e4c86---mokuwunudoneluw.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/minopawotalej.pdfIn PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/62775004756.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/birizipegosinone.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d58bf1ed4---29740064734.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70c53e4ecf---pawepipud.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c360e7da7f9---99230507261.pdfIn PDF document text
    • 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_off0000cc4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4E 11264 bytes
SHA-256: f139b88d191460e5620be6a0abddb23bd2a788321ee10925a53779a242b9dd72
font_01_sfnt_off0000e658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE658 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6A 18544 bytes
SHA-256: 4eb2691bbcbe6af7318917ce6e136a8b89b6b4d2796f3b62e23955d26239ff18

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