Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62f5f9f108b8cb8…

MALICIOUS

PDF

83.1 KB Created: 2021-09-23 10:01:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1ef77e74b36a686e0ad971734b718904 SHA-1: 86f8409cc550c752381180cdaa74b1981c05a926 SHA-256: d62f5f9f108b8cb80f78f6ce62a004ee470bac4f57cbf26ab74d8dd2510cc035
204 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript and multiple external URLs, many hosted on compromised CMS platforms. The critical ClamAV detection and ML classifier output strongly indicate malicious intent. The 'Clipboard command execution lure' heuristic suggests the document instructs the user to copy and paste content into a shell, likely to download and execute a secondary payload from one of the provided URLs, such as https://allytemp.ru/uplcv?utm_term=raspberry+pi+chromecast.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=raspberry+pi+chromecast PDF link annotation
    • http://rothemtour.com/FileData/ckfinder/files/20210905_76FC87D9D0B34902.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/6c589c9908055b5ee256615bfbf1b883/rojumorazetim.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/72109863788.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/7bvr8pntglo70m2qfm7rj4krm4/74610543829.pdfIn PDF document text
    • http://arsvet.ru/img/upload/nosonix.pdfIn PDF document text
    • http://pedraferro.com/files/files/kalarobafulokiwanar.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16133374d89351---pivejilewinojitowivin.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/vekamipelaka.pdfIn PDF document text
    • http://deaprogettazioni.it/userfiles/files/jizetorubobovovoxugegi.pdfIn PDF document text
    • http://rosg.net/sa_upload/userfiles/file/20210901122532.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/14008851594.pdfIn PDF document text
    • http://gloria-eurex.com/images/blog/file/18500931618.pdfIn PDF document text
    • http://enidental.com/userfiles/file/20210907065103.pdfIn PDF document text
    • http://fourfoods.com/images/files/86977186335.pdfIn PDF document text
    • http://flomojapan.com/upload/files/muwibiponusugabumexun.pdfIn PDF document text
    • http://yonetim.e-cari.com/upload/files/rulunupugokinopagi.pdfIn PDF document text
    • http://www.sname.org.tw/sname/ckfinder/userfiles/files/83953764579.pdfIn PDF document text
    • http://www.artefuoricentro.it/js/lib/ckfinder/userfiles/files/6379590670.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/xubuvitaratanisab.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b469ecb8f2---wegoxuxutelujijapoj.pdfIn PDF document text
    • https://democv.associasuite.com/imagenes/contenidos/files/21418608862.pdfIn PDF document text
    • http://ues-rb.ru/themes/ues-rb.ru/files/biloxavona.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/vezoradafuzonubekavunufi.pdfIn PDF document text
    • https://cnc-ar.ro/files/file/sakesomevotonudiva.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/43518927043.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/6081203347.pdfIn PDF document text
    • http://gidromall.ru/img/uploads/file/7999895306.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_off0000e111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE111 17260 bytes
SHA-256: d6c586bbe1ad91184758b0442e23a07318a3c263a9f58112e1f5ecb3eb63247d
font_01_sfnt_off00010ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDC 10788 bytes
SHA-256: ed1962e740b9a47a686993448f5d7266b6237482aac4e6160bea854b7aa094e4
font_02_sfnt_off00012699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12699 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1