Malicious PDF — malware analysis report

Static analysis result for SHA-256 600133b6811a4062…

MALICIOUS

PDF

90.2 KB Created: 2021-06-26 13:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b782e440446ed4fab0c544a4bcd081c3 SHA-1: 2a2e10512d33a77f0271d9cf2dedb1e4bcc3454c SHA-256: 600133b6811a406225eb2c3fb2af7e1f533b9d58f6cd0a9b4271bf96e492274f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The presence of external URIs and link farm heuristics suggests the document is designed to redirect users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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.
  • 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://synerhu.ru/uplcv?utm_term=how+to+make+image+mirror+in+photoshop
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/m9ma31ue8krh8ib8jivod4fujl/55210135253.pdf
    • http://3dsami.org/uploadfilefiles/gaxalidadumidotawujiwixad.pdf
    • https://247hvac.ca/fabulous1/uploads/files/keveretugalozakameserojok.pdf
    • https://aedwea.com/upload/foto/84566464914.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d13ca5e6d---60820452083.pdf
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/bosuni.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609467b1852c4---jaburobolejig.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dae13c7c4---zalenebagiwomo.pdf
    • http://abacusnancy.com/userfiles/file/bogaxunesi.pdf
    • http://weorderfood.com/uploads/files/zowomufitosavifow.pdf
    • https://luyenthitoeic.info/userfiles/file/gojaberarowukisubiguf.pdf
    • https://99shayari.in/userfiles/files/65790082951.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075dce37088c---49047167574.pdf
    • https://bojovicsirogojno.com//files/52746735757.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076b399ddce7---96484860925.pdf
    • https://rijst.nu/userfiles/file/16637065645.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab47a4ed77---jawifuropejarikovovip.pdf
    • https://olterus.com/contents//files/mejosebufaxidudulenem.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609acbf10d60c---39887225251.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e25a45049---907658401.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bde3d0bd4f8---mikobajakifigometob.pdf
    • https://bio86.net/fichiers/46148127842.pdf
    • http://hgbs.de/userfiles/file/82182201037.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe7e.bin
97ffb846ab5c2638cd2993cbe1d642d56f6345dc63604828173e250ea0d9ea39
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7E 10820 bytes
font_01_sfnt_off00011745.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11745 16792 bytes
font_02_sfnt_off00012f57.bin
18928c898f07252d121803472f490f81a1a563d3514f0ddcc8de4532c24fa272
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F57 17140 bytes