Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6cdf7f9ebc8a6c…

MALICIOUS

PDF

89.7 KB Created: 2021-08-16 22:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 984682ad4457061dcc07f6a8ef281de8 SHA-1: 1efb5e745ddff8a7674cc1006fab068541961ecc SHA-256: 7e6cdf7f9ebc8a6c67354c8e44b0fc54036451f760f2967a226623f23f81a6db
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress uploads and other domains, suggesting an attempt to redirect users to malicious content or phishing sites. The presence of embedded URLs and the nature of the heuristics indicate a likely attempt to exploit users through a compromised document, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/c481g8tdt86hpclimqp5e27li3/rovejoborigojog.pdf In PDF document text
    • https://albawadiroad.com/userfiles/files/9272725742.pdfIn PDF document text
    • https://ebooksweb.net/files/file/6216347878.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795f496c7bd---zatuzirukoxibudu.pdfIn PDF document text
    • http://medtravel.lv/images/hand_uploaded/files/nupupeju.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160835dc96add5---pinejatafejamadever.pdfIn PDF document text
    • http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/vidomavotafolu.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/50142320658.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/zolawofolimo.pdfIn PDF document text
    • http://gryfarmerskie.pl/pliki_wyswig/files/lusivibeg.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/b0750b3b3550fb22fdff7796e1225eb7/32285781983.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/84hjucumqf8g0kksid2q670sh1/24034195505.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/69683805295.pdfIn PDF document text
    • https://amgaa.org/temp//files/37873222787.pdfIn PDF document text
    • http://teechart.com/uploads/images/files/kemoxaxoru.pdfIn PDF document text
    • http://446888.top/userfiles/file/gazovubozi.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/66304313147.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/5133dd13445ef673ba729715384919d8/14691983945.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9d3abdb8b---88816064152.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/831bfa749f15549874a88106c8d75a92/posusugexave.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/80281568937.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/27318929212.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=despicable+me+3+minion+rush+mod+apkPDF 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_off0000fa19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA19 17204 bytes
SHA-256: 79be4e7ddf8fddbdc59cbe71dbd3cdfc746d80e4c7924cc31a5406e31f78fe1a
font_01_sfnt_off00012736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12736 11188 bytes
SHA-256: 140ac62ac180b4b991440aab9d23a55524d3d93ae57f59ea59d075ef7c3a4a55
font_02_sfnt_off000140f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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