Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee6289f251550a77…

MALICIOUS

PDF

81.2 KB Created: 2021-09-24 09:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 44e66167d0bea4bd7eea9d7ef9e6a8ab SHA-1: 51592ee160dd34219c9103b74499018ad0c5e415 SHA-256: ee6289f251550a77618c86c5541fd97b43e7ec970095752753bc27447497a204
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs disguised as a movie download link, with many pointing to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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.
  • 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://lnv-cnc.com/userfiles/file/lezonutozilogitudemuxag.pdf In PDF document text
    • https://crossfitbeeshark.ro/app/webroot/files/userfiles/files/90513961381.pdfIn PDF document text
    • https://stephan-kratt.de/data/reiterhof/userfiles/file/38191034613.pdfIn PDF document text
    • http://aajude.pt/backoffice/ckfinder/userfiles/files/solukuxisotupise.pdfIn PDF document text
    • http://teedinmaesai.com/user_img/file/73548191747.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/90536195073.pdfIn PDF document text
    • https://www.ocnistudio.cz/ckfinder/userfiles/files/jewalono.pdfIn PDF document text
    • https://n-tlg.com/files/file/gejojewi.pdfIn PDF document text
    • https://aordonez.com/images/contenidos/files/disigi.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/jebatosudolejukulane.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1613226b59d63d---riselikemoda.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/daxalit.pdfIn PDF document text
    • https://hanoihome.net/img_duhoc/files/biduvodimupenafasaxedikuz.pdfIn PDF document text
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/zobinenivibuvukijixawal.pdfIn PDF document text
    • http://placidlakes.com/larpm/uploads/file/wolevuxububab.pdfIn PDF document text
    • https://podimercrm.com/img/files/loruvu.pdfIn PDF document text
    • http://getwealthythisyear.com/ckfinder/userfiles/files/39946113970.pdfIn PDF document text
    • http://epodhajska.eu/UserFiles/File/tenuza.pdfIn PDF document text
    • https://marblobaths.ph/app/webroot/img/files/risokobozeduvokol.pdfIn PDF document text
    • http://webminmax.com/userfiles/file/liwasobotedeluse.pdfIn PDF document text
    • http://bjsddesign.com/filespath/files/20210917105836.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210919015650.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/68938644793.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/33232633473.pdfIn PDF document text
    • http://generoussecurity.com/uploads/16124289584.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=a+quiet+place+part+1+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_off0000d848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD848 17676 bytes
SHA-256: cc82dda3d27c233a22130bf54be2c732d97695d17d5b2526a6a62f7c23aaa60a
font_01_sfnt_off00010645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10645 10704 bytes
SHA-256: 00138949172ea941880ce98a07e8243ac962472ff8060ba70304e4afafa6b5d5
font_02_sfnt_off00011ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1