Malicious PDF — malware analysis report

Static analysis result for SHA-256 e07d2c737020b844…

MALICIOUS

PDF

69.9 KB Created: 2021-09-27 05:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 12a543f7f44bdd077454cf683fad1fb3 SHA-1: 5bc6c147c92e1d0a68b2b75216b6102e9cec5dd0 SHA-256: e07d2c737020b84481ade22ffe4822d69732d4a57a9a29552f5a950d9a3c5937
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to various domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the document's purpose is to redirect users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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://infrive.ru/uplcv?utm_term=ave+maria+schubert+pdf PDF link annotation
    • https://brianspradlin.com/userfiles/file/84021067268.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/84337082527.pdfIn PDF document text
    • http://dvif.fr/userfiles/file/mizuwegivojelefuvomibosi.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/29208284692.pdfIn PDF document text
    • http://hoinhikhoavn.com/img/files/feperike.pdfIn PDF document text
    • https://huaienclinic.com/uploadpic/files/zezelifomok.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/4368087387.pdfIn PDF document text
    • http://vln.nl/files/file/49535052931.pdfIn PDF document text
    • http://noithatmyhome.com/img/files/gaxokazimesi.pdfIn PDF document text
    • http://bibliotekaludwin.pl/img/upload/files/4080224438.pdfIn PDF document text
    • https://nordiskvillaventilation.dk/userfiles/file/16080957573.pdfIn PDF document text
    • https://possamaiferramenta.it/uploads/file/saburozonomivovukogugaf.pdfIn PDF document text
    • http://atrsara.ir/resource/files/situsoluvajugejirakop.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613054e2a05f0---pateziraboripizefole.pdfIn PDF document text
    • https://aspit.ro/imagini_ws/92794845902.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/161377e2983806---jumaziziposidupanuj.pdfIn PDF document text
    • http://tubemakingmachine.com/uploadfile/files/fozubimemar.pdfIn PDF document text
    • https://sanagustin.cl/files/poziserezirel.pdfIn PDF document text
    • http://classtool.info/upload/files/81027312383.pdfIn PDF document text
    • http://websteravelandscaping.com/editorData/file/godigufi.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_off0000acaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACAA 10904 bytes
SHA-256: 59bc8f50cd29b6a066ddaa9eedbe69eeb03954839c0ce3343c595fc542cd8205
font_01_sfnt_off0000c5be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ddd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD0 17812 bytes
SHA-256: 7c60b34b0f197208708b61f1d89390853680c59598d0cd765c9c6018cd6b4850

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