Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2bfb5ea5a122c4…

MALICIOUS

PDF

97.8 KB Created: 2021-07-25 22:34:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 62983be76fac597c437dbfc04fb17e91 SHA-1: 5f84ed33b9cf562389578a7cd9f9dcf6faeb053b SHA-256: 0d2bfb5ea5a122c4e2652e2e68c7905f457614186cbe356f8a5e95790743a827
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains an embedded JavaScript stream and a large number of external URIs, many of which point to disposable hosting or compromised WordPress sites. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade gateway scanning. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pechati-piter.ru/userfiles/file/rakejexizinis.pdf
    • http://kaizousha.com/js/upload/files/sejoni.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c29df48b254---bojinisazoz.pdf
    • http://18554080.com/userfiles/file/19768618462.pdf
    • http://placc.info/up_image/tipimu.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c02c119638b---rifepamofufobodawimekop.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/cc0paekh17ip8m3jp1jlks34au/22315755035.pdf
    • http://unseenadventure.com/userfiles/file/45216646214.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4b11f3f1b---42988185084.pdf
    • https://alshamiltrading.com/alshamilfiles/file/75930145617.pdf
    • http://studiolauramoschini.it/userfiles/files/53548731419.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c169e54fab5---jemakamelujujebijobugutu.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff07c5c42d---zenegomizomobolepewe.pdf
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/xevaweluliwamaweveruponor.pdf
    • https://dimensioninteractive.com/WYSIWYGImage/file/50162411736.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/84477dff2c37dcc2d80c79303e831e6e/zekegarilerefug.pdf
    • http://www.anjhimayath.com/upload/file/namodi.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077cc662253f---89399617125.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/mra1tvdostajg7j0tfte86pj03/37906444902.pdf
    • http://valsadindustries.com/userfiles/file/32232442339.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f6fc2f9a0---jagidajixeperezoje.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/se7iip14qpaeetnrtespm5b9ta/73705328694.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=sopa+de+letras+para+adultos+mayores+para+imprimir
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117a1.bin
7647a4f96a17666f284f96adc883e076e236a02213c766334967785f2bf2150d
pdf-font-stream PDF embedded font (sfnt) at offset 0x117A1 18376 bytes
font_01_sfnt_off00014644.bin
2c5acdb2140e3fa6eeabbf722e6411980bf50dce10f3a39f1d57d7eb5b528a8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x14644 10740 bytes
font_02_sfnt_off00015f01.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15F01 16792 bytes