Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb5f0c2f414df462…

MALICIOUS

PDF

75.8 KB Created: 2021-06-18 17:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4b3a7d64ac9090f9c07885f37b5c263b SHA-1: e5dfed05fa3c408940b70077d7cedb55ff1838cc SHA-256: cb5f0c2f414df46215321257499f9ebab8e9178e92b457c83f6e9e41912568ad
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of a 'Password-protected archive handoff' heuristic, combined with numerous embedded URLs pointing to potentially compromised hosting, suggests a phishing or malware distribution attempt. The document's content, though heavily obfuscated, appears to be a lure for downloading a game ISO, which is likely a pretext for delivering a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://irlanc.ru/uplcv?utm_term=wwe+smackdown+vs+raw+2k19+psp+iso+download PDF link annotation
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa12188beb---98926789061.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/22684016988.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/38178834581.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607212b87f94b---82832006669.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/9a53ee9dd2dbb27e08cb510316f93246/26058707548.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fbfc67016fc3cf1862ca0fb88c626255/91332926784.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160825682f32f2---kusutox.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/fabeduzusomuxikodetawi.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/6s4cfsogh9ano0snl1j9pr8kjv/padumedoloxat.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/74e4f0682ad34592dc24727bf05b2a59/dupiwazi.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/9a5b07fe8a5d665dea84304570b9e81f/pijumi.pdfIn PDF document text
    • http://citadelcaralarms.com/userfiles/file/67385889766.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/oap25i3dtqp0hgg9p5ihpho9um/80042198566.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/21708904851.pdfIn PDF document text
    • https://alutat.com/data/file/vewum.pdfIn PDF document text
    • https://europawindow.com/app/webroot/img/main_content/files/fewet.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/7b8a41f5eac456183ea84d0c72a93acc/fidejikemamizevowamojuk.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/vowonabajareme.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C4 5788 bytes
SHA-256: 32ef8dfdf2603fa1c985c4e65876f029864c2b2cad3c36cbfaac0fdfc69a6f93
font_01_sfnt_off0000f881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF881 12880 bytes
SHA-256: e07b2e0690cf37939f1456efadd96001a4e8d82b495d0f9aac51db6e4faf58bf

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