Malicious PDF — malware analysis report

Static analysis result for SHA-256 722e883d2882e954…

MALICIOUS

PDF

87.0 KB Created: 2021-09-22 11:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f3cc20893772abe2a1563c1cfffc9bcb SHA-1: 3dc8d84633f31c26a68101c2cff3be157ca4ddd9 SHA-256: 722e883d2882e9549dd7da2734333e7c56e5ae608fca5b57583e0db8ea316ea5
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://archism.ru/uplcv?utm_term=android+apps+for+book+lovers PDF link annotation
    • http://master-br.ru/img/file/23185243776.pdfIn PDF document text
    • http://7seapharmtech.com/Uploadfiles/files/70293907018.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/71417177635.pdfIn PDF document text
    • http://quangcaosms.org/media/ftp/file/kulivazupogasiwafuvesar.pdfIn PDF document text
    • http://sictombbi.fr/ckfinder/userfiles/files/63841177911.pdfIn PDF document text
    • http://musicandyouapp.com/webupload/editorimg/files/35066686626.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/161327f640de23---nonururevara.pdfIn PDF document text
    • http://viettranslators.com/webroot/img/files/muxokamumisusafefo.pdfIn PDF document text
    • http://lex.tj/img/file/82067943601.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/72457385619.pdfIn PDF document text
    • https://szpital-sulecin.pl/images/fckfiles/file/pupoverinis.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/95740184756.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf2b5aabc2---divawem.pdfIn PDF document text
    • https://g4m3s-4p1-12s1.com/contents/files/wozapuforute.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/mivomepedotujefomelaxula.pdfIn PDF document text
    • http://agriturismolataggiasca.eu/userfiles/files/93003258502.pdfIn PDF document text
    • http://vikohasanfiber.com/upload/files/tanifamemexi.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/89591920871.pdfIn PDF document text
    • http://manilag.com/FileData/ckfinder/files/20210913_E52FC386FDF1C2CF.pdfIn PDF document text
    • http://apmnir.ro/fckfiles/file/13615207711.pdfIn PDF document text
    • https://digireg.ru/upload/27487932379.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/tasajav.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/052c143801fd279ae286ec10ca12e3ad/9098310971.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c86249b0de---82745687935.pdfIn PDF document text
    • http://yusungchart.com/userData/board/file/detosibimigubosagaret.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_off0000f083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF083 10672 bytes
SHA-256: cc4594c0cee460c5e369479a5690beccbb4ce9d0bc3da95a2b25da84fcf20624
font_01_sfnt_off000108da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DA 17456 bytes
SHA-256: dfac176244b871f067d1bd772d9aebcb0f81ad95aaf21c3d9da43fffa1fa8ebf
font_02_sfnt_off00013609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13609 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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