Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f051df021814902…

MALICIOUS

PDF

84.6 KB Created: 2021-09-19 07:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 74a2e2f91e2692c64e7978c8d2c8720a SHA-1: d049e0ba7ecb940987f78b761820d6a698dfbbad SHA-256: 0f051df0218149029406b8692a40e1eb5a5854a3fab25f5035173c63d66c72c9
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many of which are hosted on disposable domains, indicating a link farm designed to distribute malicious content. The presence of a visual download button and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the download and execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://allytemp.ru/uplcv?utm_term=download+moviebox+on+firestick PDF link annotation
    • http://sarkar.ie/userfiles/file/39301307768.pdfIn PDF document text
    • https://rosanaalvarracin.com/userfiles/file/58186974030.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name/files/13032475701.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/fusuralupija.pdfIn PDF document text
    • http://dpnovelty.com/upload/files/duxelitoriwuselixitoga.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/19239366848.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145990315aa8---momiluxasewafisovebaw.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/11072766721.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b24c0d3cba---japesunozegi.pdfIn PDF document text
    • http://bladensburg.abwingsmd.com/uploads/files/50243495558.pdfIn PDF document text
    • http://showdoimovel.com/files/files/namiwamapi.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/59569246027.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/81346632462.pdfIn PDF document text
    • http://stsmcc.org/www/js/ckfinder/userfiles/files/lokowomirusakuladelizi.pdfIn PDF document text
    • https://greenboo.vn/uploads/files/23787466099.pdfIn PDF document text
    • http://sensitiva.fi/UserFiles/File/79241004631.pdfIn PDF document text
    • http://techcessgroups.com/userfiles/file/29570830665.pdfIn PDF document text
    • http://email-database.info/userfiles/file/10919013877.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/86949966769.pdfIn PDF document text
    • https://spa-salon.ru/ckfinder/userfiles/files/61137877803.pdfIn PDF document text
    • https://www.asoriofrio.org/ckfinder/userfiles/files/41294650441.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_off0000e326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE326 18436 bytes
SHA-256: 9f33cdc59a8b9936c76152c5739d72928ce8b5d30cf150627d32c9497f996944
font_01_sfnt_off0001126c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126C 11124 bytes
SHA-256: f26deda2a83b5ec1286c7ac7e77a83530eebb7eb6665d10a9a96920d92ef3f20
font_02_sfnt_off00012c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1