Malicious PDF — malware analysis report

Static analysis result for SHA-256 47a41e8a0157b4f1…

MALICIOUS

PDF

83.8 KB Created: 2021-09-15 09:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b74ebd26af7aae45039d4b70deda82dc SHA-1: e3590e5c092fa47b714c29e6bc58c2441222b171 SHA-256: 47a41e8a0157b4f185b4deb757bb917d9a0847ac3b8a0f7e0dc0a5568e2c63cf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojanized PDF. The PDF contains numerous embedded URLs, many pointing to suspicious domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to deliver a malicious payload or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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 http://floramarble.com/uploads/wifibapakidofub.pdf In PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/c75aef342862661e8fcdd0a005ada21b/23378801885.pdfIn PDF document text
    • http://lerucherdesanges.fr/userfiles/file/72766897945.pdfIn PDF document text
    • http://glttek.com/userfiles/file/dajusobajowezozabu.pdfIn PDF document text
    • http://hockjoohin.com/admin/uploads/file/robuwes.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/vaxopuvarus.pdfIn PDF document text
    • http://riasztoszolnok.hu/admin/fck_upload/file/jomikopukufimovuwajibaras.pdfIn PDF document text
    • https://holcom-solar.com/webroot/img/files/moduse.pdfIn PDF document text
    • http://slabowidzacy.smprzemysl.pl/ckfinder/userfiles/files/84011209364.pdfIn PDF document text
    • http://mebco.ru/images/file/9386348781.pdfIn PDF document text
    • http://arnoldbolingbroke.com/ckfinder/userfiles/files/larudozo.pdfIn PDF document text
    • https://atasuorganiktarim.com/upload/ckfinder/files/39279791952.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/jexebulogi.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/7489484925.pdfIn PDF document text
    • http://aviatechinform.ru/sadm_files/zijovezajedowofapetubu.pdfIn PDF document text
    • http://neboskreb-irk.ru/uploads/userfiles/files/98611529895.pdfIn PDF document text
    • https://isitekmuhendislik.com/userfiles/file/8219431914.pdfIn PDF document text
    • http://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/97686110581.pdfIn PDF document text
    • https://attackworkoutprogram.com/app/webroot/files/ckfinder/userfiles/files/79549432799.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/85272017283.pdfIn PDF document text
    • http://apismorava.eu/docs/degevujamovijes.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/sufepow.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16135f7304ebdf---74839661295.pdfIn PDF document text
    • http://wsm.hk/images/files/57350339264.pdfIn PDF document text
    • http://elpijisystem.com/file/xugepisodemokasesij.pdfIn PDF document text
    • http://capthepcongtrinh.com/uploads/news/files/55223273924.pdfIn PDF document text
    • http://alfatreyd-mebel.ru/archive/images/file/bekawinurifujeke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=shadow+fight+3+apk+download+unlimited+moneyPDF 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_off0000df0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0A 17980 bytes
SHA-256: e227d730c79e151883366b04f4baf403e07c0ff8332d174a79b5b6ba77e3982f
font_01_sfnt_off00010e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E30 11316 bytes
SHA-256: 4be259b4a5194e87a2707fb5dc45d2aef5dee3920c9ccb3f6d05a773109d36a9
font_02_sfnt_off0001288c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1288C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1