Malicious PDF — malware analysis report

Static analysis result for SHA-256 99332c6d4a45716b…

MALICIOUS

PDF

81.2 KB Created: 2021-09-22 20:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 67b7769237d867e4825cfec79c8bec83 SHA-1: a1a6511e0d7a8e9ce28cb7f775228d7d0a948c70 SHA-256: 99332c6d4a45716bd94ed962f1d02c4e2302674e575f34a3586af9181dcf9c29
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to various domains, suggesting an attempt to distribute malicious content or phish users. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway scanning. While no scripts were directly extracted, the presence of PDF-related heuristics and numerous embedded URLs points towards a malicious document designed for user interaction and potential payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://onlinetalk.jp/app/webroot/img/fckfiles/file/tanob.pdf In PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/30530706068.pdfIn PDF document text
    • http://balie.overeembv-profielen.nl/upload/files/73090780719.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/4ebqa5rid7tcmh8o4gr53vos51/wikazarazitidopukipa.pdfIn PDF document text
    • http://namngonviet.com/user-/files/dekekoji.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/zitagemunivosematida.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161392670afed2---27691909562.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/34541817827.pdfIn PDF document text
    • https://textosl.com/upload/editor/file/jimomapufag.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133950757435---mofefexojarotovoxezu.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd81171a41---nowibixu.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/21386640296.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/lozotulugumofox.pdfIn PDF document text
    • http://siciny.pl/userfiles/file/23088465803.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/b4t55phdgnjnq8njn1e3c9v23h/37760803214.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/konidukajunuji.pdfIn PDF document text
    • http://connectcontrol.net/files/userfiles/files/jobobojozob.pdfIn PDF document text
    • https://horkolas-gatlas.hu/ufiles/file/73738270048.pdfIn PDF document text
    • https://trisyscom.com/userfiles/file/pizajarogimasotigajevu.pdfIn PDF document text
    • http://doingthing.com/downloads/blog/geust/files/83946800038.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/nojanofurufesovezikib.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/fedamovuvukowuwiv.pdfIn PDF document text
    • http://bronnicy.inhome360.ru/admin/ckfinder/userfiles/files/remokumogopirudagage.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145852a06eb3---44918161064.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=cuenta+google+para+desbloquear+celular+androidPDF 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_off0000d459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD459 11104 bytes
SHA-256: 159fa31dd1bf82f724b4badded5bd442191c3a3f3396248bb873fc45322f141c
font_01_sfnt_off0000edaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BC 18664 bytes
SHA-256: 04ef23620d5d154d38d329de4ee47e2cb8e7f28593e27e1fe54f270e86e9efbe

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