Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f3f6ad905f33e18…

MALICIOUS

PDF

103.1 KB Created: 2021-06-28 14:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b04e2224334b946a5369e30b52d4c462 SHA-1: 54246371301265c520bdf5a002259f08a1371478 SHA-256: 8f3f6ad905f33e188a0002dcb3f17d9d75cf6bffaba80112eecee90be5a2b660
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document likely instructs the user to copy and paste content into a command-line interface, a common technique for executing malicious commands. Several URLs point to compromised WordPress sites hosting PDF files, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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
  • 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.
  • 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://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086982a24c62---fuvafodomuvalumiduwiwewi.pdf
    • https://cuacuonbentre.com/upload/files/bowuxekotikimasamow.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/vj0jvcesv9o0hqpumf9vmm607f/56985129115.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/140ce88e4e47a43fbc714126bc7ed659/60980788804.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/5ck603fbnpphhvs9gl0aqujsdl/34220067289.pdf
    • http://boothbayharborshipyard.com/userfiles/file/tomoxodis.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607edfd9c63a3---noxojepa.pdf
    • http://kagoshimakojintaxi.com/userfiles/file/84294199270.pdf
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/c10f7994a9932918ac48dfc81b956af8/18038652758.pdf
    • http://altiro.nl/home/tjerk/file/jafatubajivurofizuwa.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af83cde4574---wunikagejanakesi.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/938a1d45rqjrfpv3aahhgionf7/woludixezirunupawewoj.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609445084dea7---xelufezox.pdf
    • http://daydala.com/userfiles/file/nobiwitupiruj.pdf
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/87217120451.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/13f18372892d169e402a4eca2894738c/24155002278.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/vqcf0r4gmido19o4g9q0pvqduh/wimonegikok.pdf
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/f5ea23b917fca74dddaae390dc3e2862/36473715527.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/cf560f1d5538bd6d9ad6eadc6ae047d3/20938086843.pdf
    • http://anhuifan.com/upload_fck/file/2021-4-30/20210430103022746764.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa153a0243---86830523725.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=ark+island+notes+map
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011342.bin
6802d94272aeaa271f45634a4985f78f2a4bfef89e571c23fa0834f6aa120890
pdf-font-stream PDF embedded font (sfnt) at offset 0x11342 10628 bytes
font_01_sfnt_off00012b8a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8A 16792 bytes
font_02_sfnt_off0001439b.bin
32a61d067d170ef84ee3f83ad1ba2cadc23e725b0df5007dab6ea629016899fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x1439B 16356 bytes
font_03_sfnt_off00015995.bin
2294870a45d293542940079d1645cc6b63c11f825023043f107ecf2a37bad278
pdf-font-stream PDF embedded font (sfnt) at offset 0x15995 19792 bytes