Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e4c0eebc2f4ddc…

MALICIOUS

PDF

82.7 KB Created: 2021-09-04 21:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e2ad424a68f4a251506da20a15e3192b SHA-1: ba2ee493ee6c683bf12689fa135e3f02128d8843 SHA-256: f0e4c0eebc2f4ddc66b5f1970c6a21e48abf10fb215dbf7eae50b3955931681f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The presence of numerous unknown URLs suggests a phishing or malware distribution campaign.

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://fujiya-burbank.com/uploads/files/37267793951.pdf In PDF document text
    • http://sunriverps.com/data/editor/file/serowinimuv.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e04512923d---xoroguxatorufomeje.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c526f8d618e---vuwonekijegamogalalisa.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/xurodik.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/e7310a2351c2b3d957862ca746a49c6f/datepuxanoxaxirora.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b9093a2bf---luxidifijewopuxuvikaji.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/g3go0i14o70psm0s30e15ng54f/voxodupowukifebifukan.pdfIn PDF document text
    • http://k12kos.com/ckfinder/userfiles/files/75146746314.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/36861163360.pdfIn PDF document text
    • http://hangquangauto.com/files/xogalo.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/567fc4e4be05b4f8a5e71f758e92d539/96423153490.pdfIn PDF document text
    • http://konstruktor33.ru/app/webroot/files/files/gesepetelolowemimimen.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/99240408502.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/linenulozesojodifodi.pdfIn PDF document text
    • http://mlead.net/images/e/file/34422918729.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1606dfbe1bdcc0---fusipowudibotuzoguwupofi.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16082672e61b58---75356981921.pdfIn PDF document text
    • http://enidbtwcreunion.com/clients/5/52/52e94d62e82ff66504c7d921fc07bf70/File/96387491278.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/62edeb779ee643fa74a82a833ef7ecef/zeritavon.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/51948969500.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/21035716436.pdfIn PDF document text
    • http://train-in-japan.com/images/blog//file/kigodozafavenogukani.pdfIn PDF document text
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/2d9640837f7ee89ef4da58a525a37739/xapuzavelivalegujalaroju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=weekly+food+journal+template+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_off0000dde2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE2 17764 bytes
SHA-256: 05631ad97b28dd260ef4ee2dc7d4f8be70c74726dfcea32e712d1dcae6a17508
font_01_sfnt_off00010bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123CF 10828 bytes
SHA-256: 77d7c7e2bd1344e56456afbfd72eef1f0eb61363ec7f279770fed2078feb0312

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