Malicious PDF — malware analysis report

Static analysis result for SHA-256 2adcc8a16fd9ea61…

MALICIOUS

PDF

85.6 KB Created: 2021-06-10 10:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: fe99c5b762e204b0692d7750f323e885 SHA-1: 252142736348952e991c9ae10d4ee6b4da5702ac SHA-256: 2adcc8a16fd9ea61952c7a996fc72fb17e7693fb68adfeac310847a5753a26ba
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, likely serving as a link farm to distribute malware. The presence of 'free fire headshot apk 2020' in the document body suggests a lure to entice users to click these links. ClamAV and ML classifiers strongly indicate malicious intent, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://philabc.ru/uplcv?utm_term=free+fire+headshot+apk+2020 PDF link annotation
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/13fc498e85fc010a4736528af9e928fb/timon.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/faa6ba93d99fd85c07ea74473bdc6340/43386097933.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/xotekafasakemek.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/e7ed3bab6586f2efdf68233625669f06/1426133095.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/a1e0f993da9ccb997b621d5a52cd8b42/7470673689.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/070a7e7c4dfd79a2b7b98d85152f38d1/paruzinolavo.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/9a004e90a6104ba80ddf15aa4631615c/rinodebe.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/2df7c5022c3b3f5eb5024504f4bbf5fe/vesakisobifexoxotigomoje.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607604612405e---49721426947.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d63a9ddcd3---37530067277.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/6a106e3e8b1ba015f1c59f229639bbd5/wogilexax.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/32137698979.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16079b0bf10487---nuroligadudamomodas.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file/%5C/2021051312471281.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/3d6jmcsl9ldnta6thq2g19pvcl/xejigisanipeduna.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160a60b405495e---malufetadisogoro.pdfIn PDF document text
    • http://bualuang101.com/backoffice/upload/files/bipewigunuvufugisejapo.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/6eafa419f1741f4e616e183008ca4ba2/zemilizigozixopexakataxi.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/57716001100.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_off00010e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4C 5392 bytes
SHA-256: dbac03354a908d90c789eeebdc0c748d22755c6cd9221519baa7b99265f8a79b
font_01_sfnt_off000120a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A0 12572 bytes
SHA-256: 4ec69d82a99f2292e0b4ef2097e455bb6471a4ae3dfe19dc8dcf8e7743e66806