Malicious PDF — malware analysis report

Static analysis result for SHA-256 25e2bca18a817e22…

MALICIOUS

PDF

83.1 KB Created: 2021-08-22 02:04:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: cef749b2512b7f021901e7744e9825c0 SHA-1: e25eb7cbd141f62eef8521934240d8f05fc7bab1 SHA-256: 25e2bca18a817e229025f40911587c0475c387578c33882fe03dcfc9896e660c
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable hosting or compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malware. The embedded JavaScript is likely responsible for initiating the download or redirecting the user to the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://smidgel.ru/uplcv?utm_term=how+to+use+tefal+actifry+for+chips PDF link annotation
    • https://berettyotv.hu/userfiles/files/49595493567.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087ed1ee351f---30694349377.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/16918054029.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/ginekoruzewogezajojim.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/19800114573.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/91073629207.pdfIn PDF document text
    • https://zerling.eu/nico/images/files/70025871012.pdfIn PDF document text
    • http://costruzionibulagna.it/userfiles/files/19494194919.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/jenedelipagabapu.pdfIn PDF document text
    • http://newo.ru/files/files/21436494623.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/c59abdb0e60f653c90d98e6c1fc8323f/towawabowafofojelu.pdfIn PDF document text
    • https://jamisonfurnace.ca/userfiles/files/68544308285.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16081da4649663---74085236192.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d7520a867---74992332625.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/45115312511.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3b7607e89---wasemixabi.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/gotejebudorafetim.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/328b110006acdf289598e7f77024cf4c/vokuxej.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/gutulaxobexaxivuxo.pdfIn PDF document text
    • http://juha.be/_files/file/ruwikapabeb.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/d126a3b2a91671b0c5b00b6edc38216d/35807896378.pdfIn PDF document text
    • http://alumnicollegedelunion.org/clients/76066/File/13398049236.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_off0000de6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF685 10764 bytes
SHA-256: d9b761a15f80d4561d08e8999f969ec80f24c7d38329df83d00873a5480a63e4
font_02_sfnt_off00010f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F81 17944 bytes
SHA-256: 475951f9a9fa392c6a11a4e6f569c0d0f84ada849410ca85b9550b393c4c0e10

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