Malicious PDF — malware analysis report

Static analysis result for SHA-256 374d74ea713c3b80…

MALICIOUS

PDF

88.9 KB Created: 2021-09-04 00:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e6d20f63f66ee72fa622be1172dc0c62 SHA-1: e1d1c78c512053a4a46204e3b767c2d8bbf5f94f SHA-256: 374d74ea713c3b806b2e88ae688e3a405df52efa2090f07cc13300ed68890f05
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many pointing to compromised websites or disposable domains, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://micronforgacsolo.hu/UserFiles/file/zefujolegapadujo.pdf In PDF document text
    • http://toptoptraining.ru/img/upload/file/54986615424.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/10005351475.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/98316540007.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113cf52d872b---vojapajavanivijonuwesato.pdfIn PDF document text
    • http://onlineexpert.in/userfiles/file/sajebolajobobevine.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b997b1c2b78---kagixikabamaviro.pdfIn PDF document text
    • https://elpollopaulino.com/cenavarra_userfiles/files/30287900563.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/72511966472.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095eae206792---vofabujuz.pdfIn PDF document text
    • https://cafeau1ait.xyz/js/ckfinder/userfiles/files/90369713353.pdfIn PDF document text
    • https://tourpon.kr/FileData/ckfinder/files/20210814_FCF9B7C3DCBBF04B.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16078feac8c18c---6483348021.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abb8c3a687a---11804807793.pdfIn PDF document text
    • http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/nofojamu.pdfIn PDF document text
    • http://www.recko.ru/ckfinder/userfiles/files/lipilakadigolokozodav.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/a2gdudh9cj0k076qaqe6ikpo1b/fazekosigupuvobigo.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/53537993874.pdfIn PDF document text
    • https://www.gullyracing.it/admin/ckfinder/userfiles/files/58502161164.pdfIn PDF document text
    • http://domesticsolutionsagency.com/userfiles/file/15821483931.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8ef40483e---simepujipewugu.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/fcb1115368a083ae262a64390c5f1c36/70465373934.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210716122207.pdfIn PDF document text
    • http://renovator.cz/files/file/6625353137.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/k20od6i38g6ikoi23hqk8u8br1/mubago.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/84332964977.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/72045035432.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=could+you+be+loved+bass+tab+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_off0000f599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF599 17904 bytes
SHA-256: fe2dbd97266736f442c8ee27546ed8b21efc6827ac26ef39f86b423466520dd1
font_01_sfnt_off0001248f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248F 10648 bytes
SHA-256: 00c2bf58b346aea600a7f78947b2b7d3f906b29932690cbd2f4d05fc99acb92f
font_02_sfnt_off00013cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1