Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0915539755e0088…

MALICIOUS

PDF

75.3 KB Created: 2021-06-18 20:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 39cdb577e2c75320cc0763dd3f7ec7d6 SHA-1: 3405dbfc7bee182659f1425a2d5df2dfa794cab4 SHA-256: a0915539755e00885faa8670480cc03596b8f9eb43cd3b1d78326a046c528e99
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious by ML models and ClamAV, indicating it is a phishing or trojan distribution attempt. It contains a link farm with numerous URLs, many hosted on compromised WordPress sites or disposable domains, suggesting an effort to obscure the true malicious destination. The document body, though heavily obfuscated, contains keywords related to downloading movies, a common lure for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://smidgel.ru/uplcv?utm_term=kamasutra+3d+full+movie+download+filmywap PDF link annotation
    • https://mmszke.hu/files/file/18299953195.pdfIn PDF document text
    • http://parkhighclassof60.com/clients/871169/File/fevarusupegaxudixenilexor.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/16195319849.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d06cadbf3---bivefekajariwogivi.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/panoj.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/29216712881.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/266e483f9e5ebbf6230f56d5552fac74/vojetulep.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/85152c2c65aec32095a08784de31044f/suxepajexumoborofulopur.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/lezofevovepixal.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b786678d76d---marezal.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160825679499e8---bavofo.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d253ba07cf---12960935858.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/ce9c818f22f2f3fd0030f74cbf253d45/18200891266.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/88d33ee5b71bb5f4d4e4e96a00ecbf3f/87145050380.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE749 5576 bytes
SHA-256: c004f7ab83a4957731e27d65eda4c39acc73b7bc9611ef2178118d5df88f3fb8
font_01_sfnt_off0000fa4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4B 11156 bytes
SHA-256: 14b5dc3e4d31a32f244ae086e5581d2de791383314ae3ed1264fd01f05c7d11e

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