Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb81a3f6a33b9c5…

MALICIOUS

PDF

81.8 KB Created: 2021-09-19 19:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 45768ce694f2954ee3962ca3056b209b SHA-1: c1b155b327d2b1fede63ba731c81cc19c5c82e66 SHA-256: beb81a3f6a33b9c5956b51b59ccbed22707c7110995c781313d212ccc1183e88
196 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple disposable hosting domains, suggesting an attempt to distribute malicious files or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of 'Powershell V1.0' in the document text, although not directly executed, hints at potential further stages of infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://itagqatar.zajeltel.com/itag/file/files/41176837847.pdf In PDF document text
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/62233429162.pdfIn PDF document text
    • http://cautrucpalang.vn/webroot/img/files/purepe.pdfIn PDF document text
    • https://seeyounow.net/userfiles/file/teguxun.pdfIn PDF document text
    • http://loadcell.vn/Images_upload/files/bopewinoxebudesujodutifes.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/nubetikasimatifada.pdfIn PDF document text
    • https://architektor.ru/uploads/file/wugup.pdfIn PDF document text
    • https://nevisnews.com/userfiles/ruvuxaleru.pdfIn PDF document text
    • https://vientangluc.com/upload/files/rewixuganituluwojodepi.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/nikanapiwubo.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16136daef08427---97358687487.pdfIn PDF document text
    • http://belean.pl/userfiles/file/lejubivipelajakato.pdfIn PDF document text
    • http://hstairan.com/FCKeditor/editor/filemanager/connectors/php/userfiles/file/tajomajezuwifig.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/gb046h3d6otrvlc822pljchsvu/tuzapujuramusegurukow.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161452634a1585---deradibamoxidaxugovinom.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/9931125661.pdfIn PDF document text
    • http://vanhacollection.com/images/files/2503819223.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/fvm775513en0kb40pdvuctis3v/90979760199.pdfIn PDF document text
    • http://charolais-hessen.de/write/userfiles/file/51718353904.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/79715819362.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/vizokux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=play+store+app+on+pc+download+and+installPDF 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_off0000d7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AE 10708 bytes
SHA-256: 614eb640737ff9914fbe69b2675a486a93248f06c69efe44eab49d4d1316cc87
font_01_sfnt_off0000f07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10891 18920 bytes
SHA-256: 6a7262fd39f6a3d07e1ddea14ef390b491ca822ef737a880171ec2119ee81822

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