Malicious PDF — malware analysis report

Static analysis result for SHA-256 212f9a862b3504e7…

MALICIOUS

PDF

90.5 KB Created: 2021-06-28 00:24:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 32591cf29e7b106b2798814dd5a4062d SHA-1: 10079330e50190da0cec98d44fddd5cc1aa0277b SHA-256: 212f9a862b3504e7e7c44b6aa1d650c16c2c2ec7fc5eeb3288ea62a0cc7ddad8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. It functions as a link farm, containing numerous embedded URLs pointing to compromised websites and potentially malicious PDF files, suggesting an attempt to redirect users to malicious content. The file's structure and the nature of the URLs suggest it is part of a broader phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://inwebjor.ru/uplcv?utm_term=the+organisms+that+live+around+hydrothermal+vents+are+supported+by PDF link annotation
    • https://pet-fashion.ro/mm/file/97658395651.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/2qnvpdse06ku3o99e68ar9bphk/73991709247.pdfIn PDF document text
    • https://btegypt.comfile/lexetogefirugo.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/e02bsr6ct9j92a5g01mjvh44d5/vovape.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b44ff13080b---roxarasolivokiwanubap.pdfIn PDF document text
    • https://nisahanpin.com/calisma2/files/uploads/vemapowaruku.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/186381fdbf09aef7c2e94bfe49e87d56/vodifozigumebu.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/bpc8thbk0a0eevdd8s6sqsshkobo0vti/satuvam.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1607eab47274ea---nimexanukadipopoxebafoma.pdfIn PDF document text
    • http://taiwan-casters.com/userfiles/file/kofovololopuw.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/xegumavilifeteka.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/69095147135.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45f2aa408f---fogubavewesebedodowude.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e50d2a43f---nibofef.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/vfofk6rhqkm115rb300kn8g9r2/58564349635.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16073d47755d51---12814671542.pdfIn PDF document text
    • http://emeat.ru/var/files/sowemu.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1609199634e1df---nimikodadirewal.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/acc335c1a4ef27037b90dd15879dce11/pokamelofirom.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/sisupoxazumodikuditefebow.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/jdufbf5akka23ifs406tgtjqh0/dopisigojurukamir.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/39786078618.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/5hpp3qanm16jcou63a7j6tdglr/mazas.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/598d3900b046a495c29045f523c713da/32510559648.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF918 11220 bytes
SHA-256: b930b464c4a1340d510304850f8eb469078054dea18849a05cb0eaece8db023a
font_01_sfnt_off000112cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112CC 18016 bytes
SHA-256: 78bbd728ffc2eb4d3f08e8804932ee95207ba9f1e119106fd02cf5f59189dcb8
font_02_sfnt_off000141c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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