Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b291cd803c81653…

MALICIOUS

PDF

87.5 KB Created: 2021-07-28 10:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d46e50cbf5180e6b991342da58aa12b9 SHA-1: 2699b14417622666caadf4bb2d296761a8642b7a SHA-256: 8b291cd803c81653e3327cdd617be3ae8fbcaf4c4545ee95ab8c17804f8b9208
212 Risk Score

Malware Insights

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

This PDF document contains embedded JavaScript and multiple links to potentially compromised or disposable hosting sites, indicating a phishing or malware distribution attempt. The presence of a 'Clipboard command execution lure' heuristic strongly suggests the document is designed to trick the user into executing malicious commands, likely to download and run a secondary payload. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 9

  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://leuphuotcamap.com/uploads/image/files/zasiwusaxamalikozerirasi.pdf In PDF document text
    • http://brette-animation.com/userfiles/file/garisalekogisulujudow.pdfIn PDF document text
    • http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/tesaminekafak.pdfIn PDF document text
    • http://hainfelderteich.at/69020138335.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b36f431ab---99058375498.pdfIn PDF document text
    • https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/38337448593.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c78d68efe5c---64146070165.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/d0080715375f52d9c519cecd6e70da8b/74563693844.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/54gvjdo64bkds3st5ktc10k126/devisizatu.pdfIn PDF document text
    • http://446888.top/userfiles/file/39267369876.pdfIn PDF document text
    • http://guyfamilyreunion.com/clients/41950/File/28710072026.pdfIn PDF document text
    • http://georgeandmaryjones.com/clients/f/ff/ff66b05efb8f16ea353d8e6908bb1429/File/nonavireduvoxinavu.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/rabipujirage.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/kiratesuv.pdfIn PDF document text
    • https://fa-vietnam.com/webroot/img/files/wobosebotegijevi.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/6840374c8d593d52aef9a231942c9e6c/tobuzusibefir.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/b8dd46f1d9819ef40f12f4961aa1cea9/17544706002.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/78906123144.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/426f5fd15074ff023ade6a85f221f9d9/44630404557.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/jolumibudefoxasipolovex.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609832b8ae44f---22017500619.pdfIn PDF document text
    • http://lagunaapartman.hu/images/user/file/17586599847.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fd5586cc314---juzadobekos.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/91392862255.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=logic+pro+x+downloadPDF 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_off0000f08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08C 17728 bytes
SHA-256: 61ecfc8a227f43d744453cbeec0f61f8db944e61a0e9abe5dd8a821f4c723a12
font_01_sfnt_off00011f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6F 10436 bytes
SHA-256: a872ba76e3036bb5bc130aa4141ec081abd2d45d23f7608b81809853f746c077
font_02_sfnt_off00013704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13704 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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