Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf0d5cc47a1d9cae…

MALICIOUS

PDF

83.2 KB Created: 2021-09-18 08:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 491bd533405cd54745f41359242319b7 SHA-1: e0dc7ec71d8d7adb87fce922a7194ed482ea5bef SHA-256: bf0d5cc47a1d9cae725c4865d8aae9181c066081ee04afa0dac050654d49e366
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many of which appear to be part of link farms hosted on disposable or compromised domains, suggesting a phishing or malware distribution attempt. The file's structure and numerous external links indicate it is designed to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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 https://irlanc.ru/uplcv?utm_term=chrome+hotkeys+settings PDF link annotation
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/vodogejugupawoxiresudagid.pdfIn PDF document text
    • http://sklenicky-obchod.cz/web/admin/fckeditor/userfiles/file/39680532844.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/m951j9bq3kc8qntofutug9gr0h/78596439686.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613797ccbbf5f---12322321878.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/16544277406.pdfIn PDF document text
    • https://pikhospital.com/ck_uploads/uploads/files/gevepetofivuza.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/bumefi.pdfIn PDF document text
    • https://newsru.md/upload/userfiles/files/losukitodewavopuj.pdfIn PDF document text
    • http://climtech.com/files/files/25174888951.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161445ccca912c---zizugakul.pdfIn PDF document text
    • https://emotionalgift.com/ckfinder/userfiles/files/80301408948.pdfIn PDF document text
    • https://nazrabilisim.com/calisma2/files/uploads/79764842344.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fdac135491---93350592970.pdfIn PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/welosuxofumalofefufakos.pdfIn PDF document text
    • https://amzentransportationindustries.com/admin/imagetemp1/file/seliwoxogos.pdfIn PDF document text
    • http://dga.gr/ILC/img/file/jifunodofikivadudimegi.pdfIn PDF document text
    • http://nifaelectronics.com/userfiles/file/25076669579.pdfIn PDF document text
    • http://tidomusica.com/uploads/files/202109100915569470.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/67311560188.pdfIn PDF document text
    • https://cplastik.eu/data/cms/file/960546300.pdfIn PDF document text
    • http://tanphatinst.com/vietkiendo/upload/file/82432699157.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614521b8ce707---jabadog.pdfIn PDF document text
    • http://metalzilemboeventi.com/userfiles/files/torolaroxoluji.pdfIn PDF document text
    • http://dpholding.ru/uploads/files/mepemumafeze.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///11829170754.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16140ab5b69f28---fokozuragifosaraxow.pdfIn PDF document text
    • http://oumkua.com/userfiles/file/64743213027.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_off0000e230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE230 17288 bytes
SHA-256: 4174adb475020b208107682633d550ef1370f1e67b0f407d0dc5c3884fa26cfd
font_01_sfnt_off00010f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001273d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273D 10584 bytes
SHA-256: 843d19d30240f2b52e9d573a553a79caa584aa4c6c17fa74431d3dd0d4e8ff1c

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