Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ef0c3c4e7c7bcd…

MALICIOUS

PDF

79.4 KB Created: 2021-09-08 07:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1444d6ebb169fa238452aaae0d3a2105 SHA-1: 324fb8bd39042f9bfaf5ab5fe0f5c16c5c66950e SHA-256: 32ef0c3c4e7c7bcdffa8e5cfe6556ff1eff3a1c8c8659d63751a61622bc47450
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, likely intended to host malicious payloads. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically a phishing or trojan distribution campaign. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to facilitate the download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://motivationandmomentum.net/ci/userfiles/files/latofazowowefujibuvavi.pdf In PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/29147374403.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076af1809559---95858702222.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/moforososoxafu.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/bhcjaq4dcn2vm2dupgk4st88ie/kapil.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/15280394123.pdfIn PDF document text
    • http://srutimusic.org/userfiles/file/37595281022.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/livovibimomunufelifufuji.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/jowununusonopopikutuva.pdfIn PDF document text
    • http://hkbroadwin.com/userfiles/82157298910.pdfIn PDF document text
    • http://cadelupo.it/userfiles/files/rabepizojefolulilufu.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/c8232804c28c5e10f6fb0a45375567f7/mefosetawinune.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863d20b7bf3---99128103053.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/59206764243.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fe43604cf---rabekunudemegukem.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/b58e533cfc40c97eefe08e002c77c813/roguxebomejavava.pdfIn PDF document text
    • https://novitas.ro/files/93260284549.pdfIn PDF document text
    • http://ewinghighclassof1963.com/clients/e/e4/e4cb61fc1babc639533983e887b7272d/File/47396544615.pdfIn PDF document text
    • http://csc021.com/userfiles/file/20210707022943_o9uwgz.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/kojotolatusukuzutawegapik.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/127090684660c9baf0d4b0b.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/nogowijarul.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/magogelawikabuwi.pdfIn PDF document text
    • http://beergolfers.com/blog/images/file/webizosivapikuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=oregon+scientific+weather+station+rmr203hga+manualPDF 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_off0000d0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C0 17128 bytes
SHA-256: 8fdedea49cf10923e48d6c06da74bc682f8be67e11caedaed1fb77ad5b832856
font_02_sfnt_off0001151b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151B 11408 bytes
SHA-256: 2bdef1ad3394d52f7f8e11812f44b04d959035ec2ab86bf6256bc625a59c39ad