Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea84693af95dc3d8…

MALICIOUS

PDF

85.6 KB Created: 2021-09-07 23:31:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 63d07ae30c6998e1ae3ea311a7c81739 SHA-1: d5bbd888b6f60f650c2226cc5ff8437ce88b9419 SHA-256: ea84693af95dc3d836aea3fc60d7fe402d13340fb8284f558adb26f1a0c9256e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple compromised websites and disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to download further payloads or visit malicious sites. No scripts were extracted, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 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 http://residencecarlofelice.com/userfiles/files/litowijapit.pdf In PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/rc9v7ks1mjv7r2nrhffpj9h9po/pirekuwomigoduxigemep.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/velurewi.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/b09fabd3c1b7f73d8360298dc281caf0/dewulevuzi.pdfIn PDF document text
    • http://kino-cosmik.ru/sadm_files/dabibewidexewujuwiduwenon.pdfIn PDF document text
    • http://templeton.sk/userfiles/file/36083562687.pdfIn PDF document text
    • https://ever.dacola.com/upload/files/vewaxaj.pdfIn PDF document text
    • https://xn--z4qq44i.tw/upload/actfiles/89613914674.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/b503cefbe5626704ff8a2f99c06a4568/75576091421.pdfIn PDF document text
    • http://ancheng-medical.com/uploadfile/files/lufager.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160eca3006b5a0---75769321739.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/28799864127.pdfIn PDF document text
    • http://pincesorvarshop.hu/editor_up/36882085474.pdfIn PDF document text
    • https://bkht.vn/userfiles/file/29403642297.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160999dff58fdc---pekafogobawapesu.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/d820f54c6a2fe97926abf803c098762b/lujeladokorunogudejujiju.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d2a813cbe---38123709167.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/fosunudi.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/mesusuvokopefuj.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/20216121817558506.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/3a4324f5cf7104d1830b40b7693ed49b/65334927400.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ae11be172---lifareviwigawiget.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/59013187764.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b62e70bca---katutunokadukuzil.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/patejezufajo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=wishes+and+regrets+exercises+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_off0000e76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF84 10828 bytes
SHA-256: c051b227e8fd63aa317fd7be688f02011c5dd8b59a4cee12642bbe9e9d47469c
font_02_sfnt_off00011841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11841 18484 bytes
SHA-256: 08b48e25455bb2e15500b08f47e79257122144f1f25aee7c58b2a3a2ce49901d