Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e25ce90a4355d8b…

MALICIOUS

PDF

70.8 KB Created: 2021-10-01 01:26:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 95eacd8c339ce2387ce5eda3a4ca9e3a SHA-1: 9ea70f9ea079c089faa9fe782f23a3438425a7b9 SHA-256: 6e25ce90a4355d8b8f5bd74628de7575a660beb05d88a8e9e29f4ee5576071d7
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136980dea74f---78630885846.pdf In PDF document text
    • http://phaptangpgvn.net/app/webroot/upload/files/subifudulufufidizasa.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16152a8ea78f2e---tutikusokenatevezosezijep.pdfIn PDF document text
    • http://sarljarry.com/userfiles/file/30769596081.pdfIn PDF document text
    • http://ikra-ekb.ru/files/fckeditor/file/zixelamoku.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/82685744339.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/25035688324.pdfIn PDF document text
    • http://fzxszpt.com/np/upfile/file/77120072414.pdfIn PDF document text
    • http://ledlight-lamp.com/mingyi/images/userfiles/file/26066121271.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/99185047497.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/5628277941.pdfIn PDF document text
    • https://dukupahit.com/contents/files/24105686921.pdfIn PDF document text
    • http://goldenmallbiotech.com/upload/files/tudazop.pdfIn PDF document text
    • http://harc-ias.vn/Images_upload/files/kimujifosizu.pdfIn PDF document text
    • https://chsins.tw/uploads/files/202109130524022973.pdfIn PDF document text
    • https://spcinternational.in/ckfinder/userfiles/files/50676924853.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161399b22a6bb9---28091712288.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/vepotuzogavowovifamuka.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/qp0hhaq73pogj923g56s923s8m/rizexonowitu.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/jegaxebevowovewazanis.pdfIn PDF document text
    • http://tokyo-sanritsu.com/userfiles/file/tufinuserawonuvomiza.pdfIn PDF document text
    • http://unityproductions.com/upload/files/90314653779.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/17921981651.pdfIn PDF document text
    • http://idevicesplus.nl/app/webroot/files/userfiles/files/39875482141.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=new+hotstar+mod+apk+downloadPDF 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_off0000b1f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA07 10720 bytes
SHA-256: 7a98808ca300580423215e98932f7434ca30c9578ebe3570fe601be699895c7d
font_02_sfnt_off0000e290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE290 17016 bytes
SHA-256: 93e73ed19c70410d14eb2be04e4acacadf00ba3643c8cff50c4cd53257c8b44f

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