Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc6746b7e95b40b…

MALICIOUS

PDF

94.0 KB Created: 2021-09-21 00:14:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 75da927774e6f4ae93ecb94b6f8e8ad0 SHA-1: 230d58790f4d01a7d0f2fcfe7fe221d5c6fa239d SHA-256: 9dc6746b7e95b40b4a27531eeffd5eb2661f2956d46ee2fb2ef1e1347d60d184
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to various websites, including those hosted on compromised CMS platforms. The presence of these links suggests an attempt to lure users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://drafthe.ru/uplcv?utm_term=castlevania+order+of+ecclesia+android PDF link annotation
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/61712400836.pdfIn PDF document text
    • http://theclelandgroup.com/img/upload/file/digima.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613180948c1d2---32732134317.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/54e06dc3057f8f0b9bb3406ab1dd5dd7/gesuzefemadabiwera.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/9b574d09a3a330307e0587d3d8d81758/siwetitewawuketinobubegi.pdfIn PDF document text
    • https://callmarkinvestments.fortunekenya.com/callmark/files/firekatuvikikijoride.pdfIn PDF document text
    • http://autoneza.cz/UserFiles/File/97542395227.pdfIn PDF document text
    • https://konteshamamotu.com/userfiles/file/belodikede.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16148ad0923420---firaxafiw.pdfIn PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/foxubire.pdfIn PDF document text
    • http://sibmaxi.ru/userfiles/file/lazof.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/73562398740.pdfIn PDF document text
    • https://directorvincentchow.com/fck_filemanager_upload/file/61374626552.pdfIn PDF document text
    • http://konberdbio.com/upload/files/23144175953.pdfIn PDF document text
    • https://tour-paris-guide.com/cite_imgs/file/libitikatumalajizimeleke.pdfIn PDF document text
    • https://fasaac.org/temp/files/wudafijubixewa.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613f80655968c---wafuxugirapolisatosar.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/65331888265.pdfIn PDF document text
    • https://thegioibaobicarton.com/Images_upload/files/lepilafimulobuveji.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/161443a4d25a82---90021270492.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/70920082105.pdfIn PDF document text
    • https://actorconseil.com/files/file/96534774074.pdfIn PDF document text
    • http://kimdaiphatsteel.com/Images_upload/files/salefipuvesapos.pdfIn PDF document text
    • https://euroquimicadistribucion.com/zabaleta/data/imagenes_contenidos/file/55728523026.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_off00010ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA3 10568 bytes
SHA-256: 426b262b3586f5c45523ac5a9def6250f0a78a053a260b25ca4904ea0bbcca48
font_01_sfnt_off000123ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BFF 17800 bytes
SHA-256: dc95cdaec4a044860a137e1ab2a1f8897479a6a6530d994c96d05e10a77ebfc9

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