Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3ea2f0dac05e5b3…

MALICIOUS

PDF

80.0 KB Created: 2021-09-04 10:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3e0e18ad2d8ea54f4ec306421926247a SHA-1: a32cd60308aea576eabb2120ff97ab0a620d26c8 SHA-256: e3ea2f0dac05e5b32140684a86902a2eea990dab92f8303e189eab992064f0fb
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated and appears to be generated content rather than user-readable text, further supporting the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://crysiq.ru/uplcv?utm_term=foreign+aid+in+nepal+pdf PDF link annotation
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/edc3folvp8mv10s9ahcbss6p75/rakedukeledutor.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/jokade.pdfIn PDF document text
    • http://emannsltd.com/userfiles/lalimozenezuxif.pdfIn PDF document text
    • http://minerva-collection.net/files/files/2042654276.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/4373760508.pdfIn PDF document text
    • http://hzdshg.com/images/upload/File/80345030327.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/sakodimi.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/wuritizimatu.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/genokanupukawokozaf.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16096682ebdf71---kemeluxitoputezogodet.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/21475dc54dbbbee45a55613f9facb033/72900810086.pdfIn PDF document text
    • https://nevisnews.com/userfiles/lepenak.pdfIn PDF document text
    • https://franchise-vietnam.com/app/webroot/img/files/85413281906.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/9803874db52ba19d8c5aee6daf11f97d/fudodetano.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16127819dc25ff---98882127473.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/14740943573.pdfIn PDF document text
    • http://samrayburnclassof1980reunion.com/clients/873185/File/82245303369.pdfIn PDF document text
    • http://av72-reklama.ru/userfiles/file/16267988195e3c735a972cf0eb8450.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/mosevekapebaxeranakebep.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607710291895e---60026010362.pdfIn PDF document text
    • http://www.enjoyvaltellina.it/admin/ckfinder/userfiles/files/famuveliz.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/t5v9k0sppg05t2cluqkp8oso3p/josifisitenije.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_off0000d5cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ede1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE1 17564 bytes
SHA-256: e8b32a02e54131e5902c8cef2a3efcb9ef04626f4d219d40fe8fad154422f3a3
font_02_sfnt_off00011b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B8F 10384 bytes
SHA-256: ef9cc2087b8ae022303babeb7ecc73ee3e2e08750bf195a17b3101585c8ca404

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