Malicious PDF — malware analysis report

Static analysis result for SHA-256 04bad2ce89796221…

MALICIOUS

PDF

79.7 KB Created: 2021-07-19 18:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e747f22f40bb5ec87b1bc02593b2936c SHA-1: ea88f7e68359b7b35a197dab97cdc716e818b947 SHA-256: 04bad2ce89796221370678e82ffa99f2983341b5d3dc4fac3cef331284934e9e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS upload directories, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://willbramephotography.com/rezorovikozu.pdf In PDF document text
    • http://sva-jeanroze.com/xmedia/file/soxupozu.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/75163539537.pdfIn PDF document text
    • http://yuhongzg.com/d/files/jowemipizanezusavewuginus.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/854067a312d2939c2f0e1816d2af30bd/72824308948.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9bc7b13d2---deserig.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/30jc8tt6708q27p8reqp77k290/fuleg.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/71918816812.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16073fa7a507eb---80796796754.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/j8i5rhd7ghh5isvu02pt11jp3l/zepuxusozukijuwako.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609d47a600d69---63149536571.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/59740480798.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16099f3ff4d06b---22538483036.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/33168055036.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c6e0b90774726366b146ddab1f9653c7/javubupixov.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/pakapixewofo.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/850603243a6020bb0f18b029ae8e8f46/95280315840.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/fixepaje.pdfIn PDF document text
    • http://proxima-design.cz/files/file/sebinojozoluxik.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609838607c5dd---46802138255.pdfIn PDF document text
    • http://princeverma.in/uploads/files/rasosaf.pdfIn PDF document text
    • https://workinhotel.com/upload/fckfile/60696337445.pdfIn PDF document text
    • https://q-web.ro/wp-content/plugins/super-forms/uploads/php/files/t9o8rk0bkus7cfivgosq90t5vc/boguwu.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/79f947fcd996542aeb65e0ed98aff9f2/vilizitafe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=nco+of+the+yearPDF link annotation
    • 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_off0000d8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF103 10116 bytes
SHA-256: 5c17e0cfa4db7931b02681d2b19a33b0bcc48754a66630614dc9b8f8c2118423
font_02_sfnt_off000107c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C5 16296 bytes
SHA-256: 8cad5fbec1d199c3338fb4bcc9fc15f1b82aa04c5fc8d3276883f590bd1c7596