Malicious PDF — malware analysis report

Static analysis result for SHA-256 8acc9ffb253b60f3…

MALICIOUS

PDF

83.7 KB Created: 2021-09-19 12:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 295f5ba82a0643c66036112c80e3ee39 SHA-1: 8e08b8fc534bd8c3303a9bbd2fe60084720ddd10 SHA-256: 8acc9ffb253b60f3ad2e7e16ae046bf5f4517586031b7e9817be6bde4504ea51
156 Risk Score

Malware Insights

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

The PDF document contains a link farm with numerous URLs pointing to potentially compromised websites, designed to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document's structure and embedded links suggest it's part of a campaign to exploit user curiosity or trust by redirecting them to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://philabc.ru/uplcv?utm_term=shutter+island+full+movie+online+with+english+subtitles PDF link annotation
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/2c5fa28e088cb8d2eca334a251683481/66580399356.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/lisagibutedat.pdfIn PDF document text
    • http://www.malagatour.es/ckfinder/userfiles/files/50948577851.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/vafupojizexodasegune.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/08ec5f711523d68a8cc264959f921b24/nulav.pdfIn PDF document text
    • http://craft-personal.de/userfiles/file/89805492004.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/l51c58v733v5phcb92rr3jvah3/zomizurag.pdfIn PDF document text
    • https://lrsdev.com/userfiles/file/namize.pdfIn PDF document text
    • http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/84353093950.pdfIn PDF document text
    • http://thesecurityguardunion.ca/userfiles/files/bilezapabesebaboged.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16134504639d7b---digegab.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/58363209946.pdfIn PDF document text
    • https://gizaviation.com/uploads/files/fidemixikumevib.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/tekif.pdfIn PDF document text
    • https://mamalight.net/business_school/uploads/file/88759649565.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/239645804.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/wuzulavevux.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-9-2/20210902151203314319.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/vituvazadefowujugarebowuw.pdfIn PDF document text
    • https://abss.pt/userfiles/file/kolos.pdfIn PDF document text
    • https://elpollopaulino.com/cenavarra_userfiles/files/46842957490.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/89753b44efcce744bf8bd207d6050cfc/xumomivofagusopozibuxi.pdfIn PDF document text
    • http://cukorbetegshop.hu/files/zumipogufe.pdfIn PDF document text
    • http://climtech.com/files/files/woxojax.pdfIn PDF document text
    • https://anjingliar2.com/contents/files/jigijufazefexo.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_off0000e380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE380 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB92 16664 bytes
SHA-256: 416f3cc49a7bb54d4881d1511cb9c04b754c4c4181a61c985757e9d5f0a101a3
font_02_sfnt_off00012683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12683 11268 bytes
SHA-256: 7322419df5a99184ec85a58bebfcbfd5e6fb2618a76ad55da892fb6f37106513

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