Malicious PDF — malware analysis report

Static analysis result for SHA-256 c747ccfa1e5cdb97…

MALICIOUS

PDF

74.2 KB Created: 2021-06-12 06:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a55c1b774871a8a666556853680d8daf SHA-1: 6628e364fa8caa487d392b4f9712a4aab41a9283 SHA-256: c747ccfa1e5cdb97d529065cab8488ba0bfa4ed678061e73d6002a4f2696dbbc
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to a game, likely to trick users into visiting the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://garglob.ru/uplcv?utm_term=how+to+get+inaros+prime PDF link annotation
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/b619cclildoi639vamuim8665k/keboxef.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/40vi1s27k4fao8a6asjknhcbj5/tiluxakule.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/82157526014.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/1cf38dd08b522ad7f1b0cc97cc9a4f4e/36258934605.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/ed64660e29f538b1728fab02b531e64b/21204765719.pdfIn PDF document text
    • http://japan-railpass.info/images/blog//file/5999098839.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/muzevatarojafujadezuwoto.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c068eb9254---zajuvelavub.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/14076790201.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/kamemi.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/86691432444.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5a213a06f---dijaj.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/efi92lqqgojsrok1fmiv85f1d7/16184063464.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/59b18fa4bf57e637de14fd19c6bc6451/28089818326.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ac9951b30---44641329876.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608639eb8e9ee---wajavutofoxiribobesut.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/92738098189.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/8711ad5ef6a36da5ad0c3e38d449dd6b/misiwemasedimoguvejoniro.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_off0000e4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BF 5160 bytes
SHA-256: 574081c30c2053fc0644e3d88f9a1f3ce630fb8b8331144afd895f377535f795
font_01_sfnt_off0000f64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64D 11016 bytes
SHA-256: 563c6a86bf9282c48701efbafb359018369c2266a95605d3f20e45e1b0bbafd0