Malicious PDF — malware analysis report

Static analysis result for SHA-256 67baae589b2be4a0…

MALICIOUS

PDF

70.5 KB Created: 2021-10-04 08:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 3fe3b9ed3c97103ec6ede263524a01e8 SHA-1: e085ab8692952377683798b562acbb31e434a453 SHA-256: 67baae589b2be4a0f390aee3e8686a036aeacfa2dfc795aaf47eac4703384ae9
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 indicate the PDF contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution lure. The embedded URLs and the nature of the heuristics point towards an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://wastran.ru/uplcv?utm_term=madonna+on+itunes+charts PDF link annotation
    • http://soundspace.eu/Upload/file/pivuwurimid.pdfIn PDF document text
    • http://damnoen.com/ckfinder/pho/files/fotatevajajet.pdfIn PDF document text
    • http://arcadia-fitness.es/userfiles/file/muwewaxibazi.pdfIn PDF document text
    • http://live-net.it/file/vetuni.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/tejobonelajofuvinemisa.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/soduruvusadurotomet.pdfIn PDF document text
    • http://goldia.cz/data/file/11719649219.pdfIn PDF document text
    • http://hfengly.dk/skoleportalen/userfiles/file/xixamovosav.pdfIn PDF document text
    • http://pcwenhua.com/uploadimg/file/1632988105681437424.pdfIn PDF document text
    • https://senfina.top/uploads/files/11519630558.pdfIn PDF document text
    • https://estduquebec.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/xafodamokibagegobudopewib.pdfIn PDF document text
    • http://www.s-prom.si/fileupload/file/gaxafekopinuromaxigepav.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/japitijorinelijoridoledo.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/31109627648.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/tafakesitonesirazovafe.pdfIn PDF document text
    • https://andana.us/files/files/texukijazazeved.pdfIn PDF document text
    • https://warungmimpishio.com/contents/files/37640823162.pdfIn PDF document text
    • http://jtipartner.com/ckfinder/userfiles/files/49059983301.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613baeab233c1---duzejanosivepolebu.pdfIn PDF document text
    • https://olivermilk.vn/tctt/sites/aaa/file/46129076625.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/161354de38e690---wexewasarejagalojad.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/majilomevilusoxer.pdfIn PDF document text
    • http://okuninka-biale.pl/userfiles/file/22236496829.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16132b3043ca81---29900611966.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/99bb93db8c22793e65d2c793e0036569/57852760619.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_off0000b228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB228 10512 bytes
SHA-256: ec7836111ecc53899efe463acd4e475412934fd39d8a9ec44f730c6787215971
font_01_sfnt_off0000ca01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA01 15948 bytes
SHA-256: 4a5e2affbcf90cd986963671b151f447bd95c44a1964c410ea390e229a947a6a
font_02_sfnt_off0000f304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF304 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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