Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c786fe851c23526…

MALICIOUS

PDF

83.2 KB Created: 2021-09-15 09:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 12c8ace7ef4c065c7d98da3d83adfbfc SHA-1: 96c271c2f4b4bc978616b9a02ca4a3d6c02035c7 SHA-256: 8c786fe851c2352684cb2b73d785a5211b8c73ab2a9fc6a505c6ce967dedeb26
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to potentially compromised CMS upload directories, and a specific URL with a 'hack download' term, suggesting it's designed to trick users into downloading malware. The presence of a visual download button further supports a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • 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://coretry.ru/uplcv?utm_term=world+conqueror+3+hack+download PDF link annotation
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45402491724.pdfIn PDF document text
    • http://megatex-plast.ru/pub/file/zepoxetilupoxodatis.pdfIn PDF document text
    • https://shevian.com/images/file/puzum.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613acf06576dd---durazidonasikuk.pdfIn PDF document text
    • http://yieldpharm.com/upload/files/mebogafisariza.pdfIn PDF document text
    • http://koppeika.ru/userfiles/file/60420112470.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613f8c4f62cbd---jedojazuxukijowes.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16138d491790c4---179340687.pdfIn PDF document text
    • http://goldia.cz/data/file/69963345204.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021090719273473499.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/45048996338.pdfIn PDF document text
    • https://aitalk.vn/upload/files/32160626401.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1631405300.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16133161071c05---nomiwifudemijavigu.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/1kr5vo2ajj6lh7g5vmpabcspe3/75682169164.pdfIn PDF document text
    • https://bakwanudang.com/contents/files/56677051333.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/8e50030dd4651bbdcbb4cb9a466dcae7/lixuputibax.pdfIn PDF document text
    • https://ezsprinting.com/userfiles/file/21023775753.pdfIn PDF document text
    • https://tw-itemaos.com/ckfinder/userfiles/files/733105796.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/duzugorizanavixekivil.pdfIn PDF document text
    • http://runhouchem.com/upload/files/20795724267.pdfIn PDF document text
    • http://mptech.vn/ckfinder/userfiles/files/xaxubojoxo.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/mokigabuxure.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/fusokerujepodabegozeb.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/821746ea25cc45d178ca92f6f2e88da4/66893005997.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f49f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49F 19268 bytes
SHA-256: 6c60a8ce07d8553206a92d9d8996794dca9feac7cbe96a52ad6de17617d9218e
font_02_sfnt_off000126fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FA 10696 bytes
SHA-256: 824476f8da45efabdf062b814cd5280f8aba8cf312888711cc4fd865b2424e64

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