Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee24cfd7daae0fd7…

MALICIOUS

PDF

75.7 KB Created: 2021-09-18 01:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6475c8883599fc6065a67a913639d183 SHA-1: aea3425c9fa013f1baead010c639faa3151cd9ea SHA-256: ee24cfd7daae0fd77c755404e71476d216e6eda25f1fb82775cf609cf15e6bd1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier as malicious. It contains numerous external URIs, including one that appears to be a redirector with UTM parameters, suggesting an attempt to lure users to malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of hosting many links on disposable domains, further supporting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cructi.ru/uplcv?utm_term=android+1+spongebob+krusty+cook+off PDF link annotation
    • https://koltoztetes-szallitas-lomtalanitas.excore.hu/ckfinder/userfiles/files/30764457936.pdfIn PDF document text
    • http://rlmlaw.com/images/edit_images/file/vavimamudeziwodekatutuvep.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/tevefofunobifubigowizix.pdfIn PDF document text
    • http://salt17.com/userfiles/files/gigivibol.pdfIn PDF document text
    • http://nt-module.ru/ckfinder/userfiles/files/majisexufotub.pdfIn PDF document text
    • https://www.oalysa.cz/ckfinder/userfiles/files/60793110974.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24353090731.pdfIn PDF document text
    • http://educaholistica.com/resources/img/imagesck/files/zazokevoxovojo.pdfIn PDF document text
    • http://zjbfjt.com/upload/files/65618046320.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/wijigopewumasufewe.pdfIn PDF document text
    • https://negaratoto.com/contents/files/fuwagurabifafimazodu.pdfIn PDF document text
    • https://nusantarabet4d1.com/contents/files/sukijegedibaxu.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/202191217353186.pdfIn PDF document text
    • http://thietkewebbacninh.com/webroot/img/files/zabegidirepebagopide.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/53121576508.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/49579287419.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f224f63683---bozevulosirapisezavoliba.pdfIn PDF document text
    • http://hortherbpublisher.com/files/upfiles/file/sovata.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/xuwukivotalozokaxis.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161309f2fab5c4---mokifizik.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/josafagipipewore.pdfIn PDF document text
    • https://playworkspartnership.ca/sites/default/files/file/wokakifajesirosokafeli.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/ruvififovewewu.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/fopoxafijetupajakibaseg.pdfIn PDF document text
    • https://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/43960172583.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/72886910088.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_off0000c1a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1A3 17652 bytes
SHA-256: 77c97aca783bd4e656edd190144796c99a264888bc30a6c9f424038106a7904e
font_01_sfnt_off0000ef4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4E 11068 bytes
SHA-256: 06e2fb98fbff9ae2a8a5f8a378bccb79ebf56e8a016e8b35483d84af7d7a9b2b
font_02_sfnt_off000108e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1