Malicious PDF — malware analysis report

Static analysis result for SHA-256 b815a03258b3552f…

MALICIOUS

PDF

83.5 KB Created: 2021-06-10 00:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e855677ad538ca7c391f695e178f165f SHA-1: 308077138fb1f77234030b86f0457564eaae815d SHA-256: b815a03258b3552f91ba660cc337310e6acdbef05547bf4d66ec5f539243a2c3
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to numerous compromised WordPress sites, likely serving as a distribution point for phishing or malware. The presence of 'utm_term' parameters suggests an attempt to track user engagement with these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=ark+trader+life+discord PDF link annotation
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160b955d3c7735---zixuna.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf99de8e29---rijexowovu.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096650b4837d---41430074745.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/9869eaec75a185f648dc2f62de62cff4/simoxoritozukutomut.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0550a5ebef---timaniwugolopu.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b040635296---tilikobux.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160967bc5422a0---51491233746.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/9a483a755744501f7d59400e138778e6/45248914195.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/vaoj5tg63k8ppspda1r89k3d60/vuxudaluxu.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/2kjhgvq6375591o9ja300nc2qh/mesusozajotinerumam.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a8e7bf245---99989374809.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/9af540r0ad1gucasho8lvqe411/87674445692.pdfIn PDF document text
    • http://bocghedanang.com/media/ftp/file/67266693122.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6bb242cc4---tonedi.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/51970257634.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/27641486072.pdfIn PDF document text
    • https://noddy.nu/images/file/sipuri.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8334cef15---sikolezuwar.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
    • 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_off0000f37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37B 5068 bytes
SHA-256: 748155834f8c4889113d88f3a8603d27072f302baccb13b602e57c59f2107235
font_01_sfnt_off000104cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CF 11208 bytes
SHA-256: 17eae22b817a45873adfef332f0650f52e7a7487f2902f8e0270fd225d5c4cbf
font_02_sfnt_off00012a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A89 16376 bytes
SHA-256: 7df701042259bb44e5a496d524acea93ce8f3232f7fcd2cbc570a123a0b9c835

Open this report in the interactive analyzer, or submit your own file for analysis.