Malicious PDF — malware analysis report

Static analysis result for SHA-256 39eeb5a2a3b021d9…

MALICIOUS

PDF

86.4 KB Created: 2021-07-06 05:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: ed8af19ab1a29821e9b6037bbfb4c460 SHA-1: 895a977e4a4c8046a423f3947691e8793edec884 SHA-256: 39eeb5a2a3b021d9103e3962db40c6b5073b3ed5b85a7154ee66738965bd4254
196 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_CLICKFIX' heuristic suggests the document employs social engineering to prompt the user to execute commands, a common tactic for downloading and running further malware. The presence of numerous external URLs, many hosted on compromised WordPress sites, further supports this. No scripts were extracted, but the overall pattern points to a downloader or initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://cructi.ru/uplcv?utm_term=how+to+download+a+texture+pack+for+minecraft+bedrock PDF link annotation
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/5ae09736993e9315c61dcda4d75a5d9a/jovobanexabowiwavitapi.pdfIn PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/51851237388.pdfIn PDF document text
    • http://proxima-design.cz/files/file/97129035192.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/e42dd7dfbe5896b0be785db6467ae8e7/81402576202.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/vijelidixelafivin.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/912322879608ccedb09c60.pdfIn PDF document text
    • https://iva-vietnam.com/userfiles/file/27355778825.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/81495tb7ln1q7it0m6k1ft5pen/88051574434.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/g1hpq1me8vmc0qs6doljmqoio5/27797058937.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/a5243e87c03bcbfa4b238dd7fffff636/vadimu.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d204a7c83c2---11534823071.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/3d6902a6e936665397f3097488ef5dbf/fujijejivimuzurez.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdd32f3b17---73007693395.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/0510b3251160e72f54bd93f41f7a7e5a/jetenibujokozotivut.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/39361621417.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/zagemovobefafoket.pdfIn PDF document text
    • https://aashianarealty.com/file/najebunugevawawabusexuxa.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a910f92bffe---48285813982.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/4bd6995df1f317a4b7151678b301caa2/jetenivixexu.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a83cacdc514---turunudexixesiwovevu.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/geredimavefuzogoporobu.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/26021276004.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/ea00df15289685023fd3308a34b9de54/koredidapesomamalaber.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6959ab0a2---gitovagunedomasul.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E8 11124 bytes
SHA-256: a67087e1a8dd281cee736a6cbbd7113bce4b981d80842de23b6ae5d592526288
font_01_sfnt_off0001039c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039C 17552 bytes
SHA-256: ac597cf69070d111bce9054c55835179924d5fe255daa0175159a195c4870730
font_02_sfnt_off000131e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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