Malicious PDF — malware analysis report

Static analysis result for SHA-256 80da01084cacb075…

MALICIOUS

PDF

84.7 KB Created: 2021-09-16 00:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cae519125ca5cfa4644670ed9853f045 SHA-1: 8f3b7e21d440a0a01246f367cfda6323215caf9a SHA-256: 80da01084cacb0759840ebe9564b867ade9a8c50cce86211fe3a4c718800df6d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to various domains, many of which appear to be part of a link farm designed to obscure the ultimate destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly indicate a phishing or malware distribution attempt. The presence of embedded URLs and the ML classifier output further support this assessment.

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16130bd40251e3---nurokoxiludiginasaso.pdf In PDF document text
    • http://jumpstart.mobi/ckfinder/userfiles/files/xamivorupolor.pdfIn PDF document text
    • https://mmgrowersg.com/ckfinder/userfiles/files/53048873304.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/kafudibagivebefo.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/68855940537.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/7123409359.pdfIn PDF document text
    • https://vnjhanoi.com/upload/files/45362646066.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/161400eb047948---podenamoguk.pdfIn PDF document text
    • http://zopos.zohukum.com/ckfinder/userfiles/files/68012647771.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/57305471283.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/rizivifuwetobon.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-9-16/20210916050038538441.pdfIn PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/womowokirifupujejino.pdfIn PDF document text
    • http://police8coop.com/UserFiles/file/worupebuve.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/kezomixa.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/jigufoxesidajojogapi.pdfIn PDF document text
    • http://taaltoetsvo.nl/userfiles/file/90960245213.pdfIn PDF document text
    • http://dispensapertutti.com/userfiles/files/16467978972.pdfIn PDF document text
    • https://khambenhxahoi115.com/images/files/8242246342.pdfIn PDF document text
    • http://specialcats.nl/media/files/64988561672.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/dokuxaledibusokezox.pdfIn PDF document text
    • http://waycreon.net/bhaskar/yii/upload/files/80358656578.pdfIn PDF document text
    • https://wroclawmodelshow.pl/ckfinder/userfiles/files/29271252943.pdfIn PDF document text
    • http://star-transform-moscow.ru/uimg/files/wuzemuruvijevajoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=font+choco+cooky+apkPDF 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_off0000d9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AE 10116 bytes
SHA-256: 9f5bf33cf4466ffe04d2a241ba98b7be4de69a9ffff9a7678b7a6eb562806c84
font_01_sfnt_off0000f03b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03B 23376 bytes
SHA-256: 22bbec14fb3f7fdd9fea82b2458a7df33c77a67492a77d5f1e2fd4bd86db1f26
font_02_sfnt_off00012dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1