Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc249c695653e3d…

MALICIOUS

PDF

77.5 KB Created: 2021-08-02 19:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cb52a0e4ea39ae9dac089dd2ec1860eb SHA-1: 8882590aa4c08d39520cafd6af84330a595fca71 SHA-256: abc249c695653e3d3c42c08c71dd6159e4b3ffe7d7f577ae2642b546232e78f3
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to external, potentially malicious, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://daiichitravel.com/uploads/news_file/61674317386.pdf In PDF document text
    • https://soechi.net/userfiles/file/37953980341.pdfIn PDF document text
    • https://waelfawzy.com/userfiles/file/In PDF document text
    • https://associazionebriciole.it/public/file/mezapezitatezisoraferatow.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/90929551165.pdfIn PDF document text
    • http://limeitec.com/upfiles/editor/files/74617883271.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ce7c7e371a2---88399290179.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/ohka320mj04k1ehfhc434n18v6/vowakobitatitogebijawon.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/o0632q6a6kg3cds3n9h54r09pk/39398294363.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/95bb9fd217e40415ed7be207f71dc4eb/gagilakojimusofakide.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d482a7525b---sigaxerudipasob.pdfIn PDF document text
    • http://shs1977reunion.com/clients/41590/File/64207632097.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/39190285381.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/8b2a26d5dd34c15405cd2549f4710e81/muribovufebatalibexate.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/lorifup.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/7bb1f951c23b2b9b3658a38e00dcc187/takoberulorebobiserebe.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/47076810026.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeabb79b56f---vetuluvifoxipojojiwejevi.pdfIn PDF document text
    • http://www.ctnphrae.com/ckfinder/userfiles/files/4775038268.pdfIn PDF document text
    • http://locthanhroyal.com/upload/files/kigezabulidiwulagafekoj.pdfIn PDF document text
    • http://geometracosentino.com/userfiles/files/fokipomobojugezovo.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/g3n25vvq2bfdbdfr69ocre8ftk/36580295554.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/37317131866.pdfIn PDF document text
    • http://alfonsoguiggiarchitetto.it/userfiles/files/92580054018.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=salvese+quien+pueda+andres+oppenheimer+pdf+descargarPDF 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_off0000c6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000def1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF1 17796 bytes
SHA-256: 087a2660d9c55f5e2e3975bae21a7e8ed8f9ba7af6d46ebc3bf51b9650969982
font_02_sfnt_off00010bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEE 11356 bytes
SHA-256: 6b15384c2e1cffc2438258bfe8a9d386c4e99654de02254d248d98eb8f84efeb