Malicious PDF — malware analysis report

Static analysis result for SHA-256 0330fa23312cfc90…

MALICIOUS

PDF

77.0 KB Created: 2021-09-01 19:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 32a3cf629200525e3243987b0f149cfb SHA-1: 77ad99b44dead84ff63a2390fff67ed466c27e0c SHA-256: 0330fa23312cfc9028e8922173131545abf0155ed6354dbe3f88a0d3b9d24978
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which point to compromised websites or disposable hosting, indicating a phishing or link farm scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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
  • 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://ketchas.ru/uplcv?utm_term=computer+system+architecture+morris+mano+3rd+edition+solution+manual+pdf PDF link annotation
    • https://fallsplat.se/file/velibatomen.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/bevizikibuvopimoxixij.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/24370294181.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075391cc168f---relonililut.pdfIn PDF document text
    • https://rosanaalvarracin.com/userfiles/file/97377829291.pdfIn PDF document text
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/80894328155.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/5d9a7da93d43eef86629ac84ff6aba05/30075196695.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/49eb658e842e98bfbb8106274bec3748/82131690248.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/sugadujovajovopisifaw.pdfIn PDF document text
    • https://people11people.com/uploads/File/66490067202.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/nekegipi.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16103b191b308c---54537447121.pdfIn PDF document text
    • https://pubs-icfas.org/icfas_new/dev/ckfinder/userfiles/files/makaxipi.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/vuterigudisokususawiwu.pdfIn PDF document text
    • https://fleuriste79.fr/ckfinder/userfiles/files/44204448125.pdfIn PDF document text
    • http://ketnoikienthuc.com/upload/files/tetuvelejebinuvez.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/17pqoaacd8an29atbk8hhg3042/68990585423.pdfIn PDF document text
    • http://cozycornerexpress.com/uploads/files/28392624149.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/3465ad5b8bd554d7547bd7f2daca1c21/72674182364.pdfIn PDF document text
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/70869179177.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fdb69c483ac---81139977709.pdfIn PDF document text
    • https://led7.ru/file/diwaxowagevase.pdfIn PDF document text
    • http://brandorbit.in/userfiles/file/wodenebirew.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160fa451327a26---84353644579.pdfIn PDF document text
    • http://dom-2000.ru/ckfinder/userfiles/files/92434793264.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_off0000c6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000deb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB3 16872 bytes
SHA-256: 42e8a36ad15bb76a86b12b7638a842a5c8db953ca1831fe74973af6ad1afe4aa
font_02_sfnt_off00010a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A65 11300 bytes
SHA-256: dd8637fe87782795bf7a9a4a0085a331d7a1d74b227f9f2a49d793051c93bec5

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