Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb45cd3a25dede1…

MALICIOUS

PDF

83.1 KB Created: 2021-09-03 06:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e0f5071a7d8f652e941e5387b098d216 SHA-1: 080ceafc0b3f4fa1ff8ddebe12cbd1137517e8f6 SHA-256: 2eb45cd3a25dede100f397ad1dcd18f31881754dbc6473ee356cee031827a096
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. The heuristic 'SE_INVOICE_LURE' indicates the document's content is designed to trick the user into clicking these links. ClamAV detection and ML classification strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/765cba77ecca3a66e2a0e5289d98ad9b/24911423301.pdf In PDF document text
    • http://wonderful-foods.net/userfiles/file/dagitevesakupamulo.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/wumut.pdfIn PDF document text
    • http://cooperclassof1970.com/clients/9656/File/buzebafuzezelenanasunejiv.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/82141321752.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/84840890867.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16083b60b59188---79377294769.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/ei1quv2t1056q3hbu9l709tnha/zizitamiki.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/fitawivasu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f49390e125---roxukagovitubojiredowuri.pdfIn PDF document text
    • http://kubabus.cz/novy-web/upload/file/bubadibedomefisazuvodaja.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5cca96315---82619619415.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/kabevavugik.pdfIn PDF document text
    • https://ezsprinting.com/userfiles/file/ripudojejuzukiz.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4fddd9281---55584990739.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/73059275790.pdfIn PDF document text
    • http://www.guus.edu.mn/ckfinder/userfiles/files/7871723560.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/dazipaken.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/161100f9155e13---muzupusa.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/tulegasefudaporafu.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/20226816271.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/ramujivedafesero.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/23117402919.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/04a28a03a5eb5a448c088844b64caa51/48956667371.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=transactional+theory+pdfPDF link annotation
    • 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_off0000de36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE36 10796 bytes
SHA-256: b1961baa4cba3024da382b6e7ce338a4e69d0790d5da35ae3fbd24b19bfe53b3
font_01_sfnt_off0000f70a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1C 18316 bytes
SHA-256: 9184e7b0c005952fe51cb0eda6f91f10af6fc9967ffd24f23044950de0363bd3