Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc00e815bb178b1…

MALICIOUS

PDF

86.6 KB Created: 2021-08-22 00:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 412e5c35c3d009c13677027b93c1de72 SHA-1: f46203777658a33de9412163102d7432aa58577e SHA-256: 2cc00e815bb178b1f8e168712eb88fad21a5c338f4ba78f14065be93d36c5220
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF sample was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV also detecting it as a phishing trojan. The document contains embedded JavaScript and a link farm pointing to compromised WordPress sites, suggesting it is designed to deliver a second-stage payload. The presence of invoice-related language further supports a phishing or scamming intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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 http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a512023a1e5---liwekatowake.pdf In PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a84a3b4bc9f---60555607388.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9792e243f---20469467413.pdfIn PDF document text
    • https://gujaratisamajparis.org/upload/files/nasov.pdfIn PDF document text
    • https://agatanorek.com/files/file/bimekozipan.pdfIn PDF document text
    • http://wtmongolia.com/materials/file/nerujupabib.pdfIn PDF document text
    • http://hsiwww.com/image/files/20210622_212510.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/zetelopanekemum.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d2f92542b4a---37910504238.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/fetewoluxokokunesobonawik.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/xewewojufefijezobile.pdfIn PDF document text
    • http://gunjanjain.com/app/webroot/js/uploads/files/22657210036.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/69899905787.pdfIn PDF document text
    • https://tigapilar.com/upload/files/xepuxotumezakebe.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/12100545815.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/1787066787.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090c1cc8cfd6---voralosakera.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/83318555934.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/jemix.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/5f75a0d833ddb9f384097f3918ac1893/tunexat.pdfIn PDF document text
    • http://www.jfac.kr/ckfinder/userfiles/files/megabukodujil.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93e6f4b547---83837553336.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/2896987458.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16081c56fd5925---21816240384.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a4ab21bfbf---xexofawigonexaxet.pdfIn PDF document text
    • http://dzbnf.com/upload/file///diseromemaxazejenafekaga.pdfIn PDF document text
    • http://mfcpavpos.ru/file/wolumop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=sales+commission+invoice+template+wordPDF link annotation
    • 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_off0000eb56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001036d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036D 10904 bytes
SHA-256: a263e9fd431a049b93f50f15349dd61e3faba55ff836268a3eb6fa731a25eebf
font_02_sfnt_off00011ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA5 17308 bytes
SHA-256: 0f01bbaa7c5dffdd3c3a5c3a936bde9cd1cd810a0c72cdf803429a5a535be6b1

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