Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3ec644a642d7db…

MALICIOUS

PDF

109.6 KB Created: 2021-06-15 10:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bc277f9b4f9ea089ff0853a4470274a3 SHA-1: 78a065991816d393dafe1a793f820a689df42914 SHA-256: 2e3ec644a642d7db8d9427f6133b449bcb104677cc04937f11c846cf6c9fa851
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It employs a link farm strategy, presenting a lure for 'Finding Nemo free full movie' to entice users to click on URLs hosted on compromised WordPress sites. These links likely lead to the download of a second-stage payload.

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://krisoc.ru/uplcv?utm_term=finding+nemo+free+full+movie PDF link annotation
    • https://ludifrance.fr/userfiles/file/ririkebetidajefu.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4843a8f328---23108090253.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/da448003f4c7d64915f04cae12fe9cab/vuwapo.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872cf013be3---87656398282.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bef9006e491---51017716151.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160917da7c2678---renomamarawagusiguwelagi.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/10250490146.pdfIn PDF document text
    • https://windsbs.biz/files/file/50367389692.pdfIn PDF document text
    • http://adria-ex.com/47373821802.pdfIn PDF document text
    • https://couvreur-hautdoubs.fr/internet_new/images_et_fichiers//file/xadamib.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/71813057797.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/6722569876.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f58ca30290---97500578647.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/15695522892.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/9bb83006e37a7b0755f6a5d2b5b612b8/36786376284.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/wofavewumatojumazupeko.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/55b7698b552e560bc6a9fe18ff8fd4e8/4670070968.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_off00017096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17096 4852 bytes
SHA-256: 8f1619448457e070abd1ded4f640ef78dfe412ec75f870412dd48206de436d4d
font_01_sfnt_off0001810e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1810E 11804 bytes
SHA-256: e5761f961ab706bd2b881a538a8c9d7188eb8eab761c36e404141bfa91632656

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