Malicious PDF — malware analysis report

Static analysis result for SHA-256 44e9c80c75cd4fd4…

MALICIOUS

PDF

88.1 KB Created: 2021-07-25 04:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3e2b56a81116dbcb359548fcc30adfa7 SHA-1: d7466a513816a657eb86bc9101edd28939bf2997 SHA-256: 44e9c80c75cd4fd48119fb57499d9fc745ede9b47233ae1fcb330b397be29538
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to various compromised websites and disposable hosting domains. The presence of numerous PDF link farm indicators suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 http://globalroomplus.com/bot/ckfinder/uf/files/21122755168.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/47abf621480b0c5a07ba88691b8121c0/sewomasapenukulekuwu.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/c93ac1a4337a1cc9c4f1443a963fc0cd/tewibifonivinemuxetaz.pdf
    • http://ssujaxchapter.com/clients/83257/File/5264185509.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/bd90376d9daa5a73b6080101d6803e21/fawemolokepize.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b4468c3ad---nelineroset.pdf
    • https://le27.fr/docs/file/81159737227.pdf
    • https://cualuoihoanmy.com/uploads/userfiles/file/zojizi.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/8b8ff6ffb6e09b96cd7c3b557db0eed6/xenazejiwaxozuvofijakoku.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c0565917a---14932783101.pdf
    • http://brightwayconsultancyservices.com/userfiles/file/57923143239.pdf
    • http://dogninja.com/userfiles/files/bepokemabuf.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ae4f67f04---60904814049.pdf
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7cb148afa---kasixilelidit.pdf
    • https://pabrikangka.com/contents//files/xuwajemojosopejugalot.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bad6bb6a3e7---17880017767.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0d6e6cc6f---vikotajude.pdf
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/verujomozenid.pdf
    • https://ceccarbotosani.ro/userfiles/file/19756832368.pdf
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/41366238012.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+cancel+linkedin+premium+from+mobile
    • 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_off0000f2af.bin
bca9ce211e85bd94555f898ae8a43985f1a697cdec84faa0899408ba4dbf8820
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AF 17452 bytes
font_01_sfnt_off00012069.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12069 16792 bytes
font_02_sfnt_off00013880.bin
1250c98a24205a9f4bffaf2bb9d7b98d2db0a34eb5d2ba843f217a5af2e704de
pdf-font-stream PDF embedded font (sfnt) at offset 0x13880 11024 bytes