Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef8d878814079a2…

MALICIOUS

PDF

80.9 KB Created: 2021-09-19 19:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 17eb4d84a1aa119e549ddddf4a6bef70 SHA-1: 161bb0c73b5cf2a9bb9ce67adaee780fbd0f4f0f SHA-256: 0ef8d878814079a2f7e0c8078199eb32e602670ffd7c72271c4cc4157117b193
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 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.
  • 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://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16137e5e77c3b1---vijokuliferufikumemas.pdf In PDF document text
    • https://waelfawzy.com/userfiles/file/In PDF document text
    • http://morpheus-architects.com/file_media/file_image/file/14959384427.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/e3a0bab0d3075aa3756e5a292e5ea5e3/54826420384.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16146c109a2c8b---75125990858.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/e8051ef268feff91d3ed6588a4b4d5cb/5475490162.pdfIn PDF document text
    • http://khiensa.com/UserFiles/File/60080316186.pdfIn PDF document text
    • https://un7un9b3rl1pa7-99.com/contents/files/51036574229.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/21146550926.pdfIn PDF document text
    • https://rakbah.healthybitespk.com/alpha/ckfinder/userfiles/files/tivubojaba.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/58391480021.pdfIn PDF document text
    • https://playworkspartnership.ca/sites/default/files/file/77409062697.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcbca7d617---pawifezurafidibev.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/fekomisami.pdfIn PDF document text
    • http://everbeenmagnet.com/js/upfiles/files/mavanepurodisapame.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/80726416117.pdfIn PDF document text
    • https://md-bud.pl/szklo/photos/file/lisaganawiwijupewakozabep.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/37539713306.pdfIn PDF document text
    • https://giaphutelecom.com/tctt/sites/aaa/file/lajobajamuxeg.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///lezujemomemolifibifag.pdfIn PDF document text
    • https://gianlucabruno.it/dati/upload/file/vuxirolila.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137fde6e2c98---vojekelatedox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=dgp+ielts+essay+book+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_off0000d630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD630 10816 bytes
SHA-256: 87983808c3dd916636ecb0b98d5369147b580ebf30c73ae09dbc437ce4c6995d
font_01_sfnt_off0000eee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE5 18668 bytes
SHA-256: 3cbc1f77d7f050a303a01b650ac3c784a78b51ddd4378b530843ccd47e665b0d
font_02_sfnt_off00011e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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