Malicious PDF — malware analysis report

Static analysis result for SHA-256 05a6500244094d60…

MALICIOUS

PDF

81.2 KB Created: 2021-09-07 20:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: aef6c5503e7e6a6eee2e99d515718356 SHA-1: 0f45de1277a6e26cdc5556984a872b7e2bca6580 SHA-256: 05a6500244094d60dbfe477f5acc5e3ebb528c15667187643150b1b814585728
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. No scripts were extracted, but the presence of external links is the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf668b06d4---2501298143.pdf In PDF document text
    • http://metabolitplus.ru/files/file/lezobusugavitewi.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/pd5djc0k18f601k38vp8l539gs/ridopefawodomimatagaviwig.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/nenituladetusoso.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3bcf85d58a---99604496506.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a733691a99---pizivopuvorukot.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/51899179655.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/75910903401.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021072816022675.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/92rfujeth6k1qchbrg2sfn46ku/ziboxox.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/g0us6uldgjhh5g90cqvqjuvu86/wuzagogufepato.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfb7cd3e334---90084089973.pdfIn PDF document text
    • https://cantellodetersiviprofessionali.it/uploads/file/61037708186.pdfIn PDF document text
    • http://www.chubsorn.com/file/files/90953808224.pdfIn PDF document text
    • https://pasarantogel.com/contents//files/82414492324.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16077b6c053e25---vasukidobilegegolidave.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/9995ab14f5b25a624c64760d374f0d75/vukeribemepurerovo.pdfIn PDF document text
    • http://chandravanshi.com/userfiles/file/494049833.pdfIn PDF document text
    • https://tw-itemaos.com/ckfinder/userfiles/files/47445045502.pdfIn PDF document text
    • http://incomingmakedonia.com/files/files/vonuzafosojo.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16090f15c8a63f---fajelowitidinuganefujuk.pdfIn PDF document text
    • http://dongkoo.com/uploads/editor/files/vatipun.pdfIn PDF document text
    • http://5thaveseniors.org/userfiles/file/xevaxivegomesajixejeve.pdfIn PDF document text
    • http://rogo-rotterdam.nl/files/30159018797.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/wenipozif.pdfIn PDF document text
    • http://sparkpro.lv/content/file/91494275111.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/m4rtn0nsv2oa619i4u4b9u6u9h/jifaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=map+of+china+provinces+pdfPDF 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_off0000d982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD982 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF194 17488 bytes
SHA-256: d4707f06f2ca27400d1f0fe7fe04d48fe2356866302181376e0880fa3ebfe663
font_02_sfnt_off00011eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB8 10632 bytes
SHA-256: 2c2f8625ff4b9232c0d5429a1f4d4f400936e782531ef7280e57720e3c56887a

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