Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ededf364e239b4e…

MALICIOUS

PDF

63.2 KB Created: 2021-06-21 01:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b70b3accd05dc95d459244ff555d7ae7 SHA-1: b7d19e70fd02f7b9762b84722c9ca3f072b4d523 SHA-256: 3ededf364e239b4ea30176dbaed8e5bd6314721ca6fb308dcef0b8c22add9a73
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning model as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links and references to exploits, specifically mentioning 'Roblox exploit for android', and points to compromised WordPress sites and disposable hosting. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content or phishing pages.

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://synerhu.ru/uplcv?utm_term=roblox+exploit+for+android PDF link annotation
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/bpsegd8k53ovjp0eku1g00db5s/86661528801.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160764b46b04a4---xodekizexirizo.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5be4bc9bf2---belowarisofuzarefez.pdfIn PDF document text
    • https://semut73.com/contents//files/moluvizawegekevoluxatezix.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/a509ad1716ec11f64912be42a3e2d81d/fipobemanuwawirabolenalos.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076dcab7ac37---zamufifitilufebufisaf.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160744b341cdde---41046666003.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16217973301049.pdfIn PDF document text
    • https://ntwbearing.com/UserFiles/File/89343304915.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file/%5C/zaxapowegojimi.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/dd0b6f5258067b669912f04e01e4b1e1/rasisaru.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/38472527772.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/mokuvaviz.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e4f164cad---43944399221.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608704b3754f2---43524694554.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/0923afbe1d47899830176973d86c3fb3/bajuzuj.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_off0000bb2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB2F 5072 bytes
SHA-256: 7549a5ea03b153c3a719c4c51fdbc4ad54e224c528ea903b50497effe19140f7
font_01_sfnt_off0000cc83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC83 10572 bytes
SHA-256: 34a525a83e72a0b1cb28d6c4b5697d96815966ae65fecb1993fe5f85d8265374