Malicious PDF — malware analysis report

Static analysis result for SHA-256 48941b1d208f7b79…

MALICIOUS

PDF

87.8 KB Created: 2021-09-13 19:20:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 41ce9d7a291f3a21e412a422a4af7e51 SHA-1: f1fe4b49dff8b5f09980f375d61b8ce6ca2b6ece SHA-256: 48941b1d208f7b79b8b27b4cc863662a04104f527c9c2ea36649e7ac1bb81a68
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The presence of an embedded JavaScript stream and a high number of external links, many hosted on compromised or disposable domains, strongly indicates a malicious intent. The ML classifier and ClamAV detection further support this, flagging the PDF as malicious and potentially a phishing or trojan delivery mechanism. The embedded JavaScript likely attempts to exploit vulnerabilities or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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.
  • 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.
  • 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://ordineveterinarivenezia.eu/userfiles/files/povidiwapisikomi.pdf In PDF document text
    • http://chpcentre.com/files/file/kosojutodusur.pdfIn PDF document text
    • http://lavalnerina.com/userfiles/file/dejilej.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/8df0cbd154aaf98efe8410a5e2b687e8/10099113225.pdfIn PDF document text
    • http://medianet2000.net/amm_prod/image_news_popup/file/panoger.pdfIn PDF document text
    • http://www.toptehnik.si/images/fufuzoxukowodu.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/welejik.pdfIn PDF document text
    • https://alcoolassistance-creuse.net/www/site/js/ckfinder/userfiles/files/pijowefawowumi.pdfIn PDF document text
    • http://www.fuchingrading.com/upload/file/94865997890.pdfIn PDF document text
    • https://newsru.md/upload/userfiles/files/fabadogoronuperevu.pdfIn PDF document text
    • https://adeptos.clevercloud.pt/images/items/files/45389751647.pdfIn PDF document text
    • https://sadhankendra.org/erc/media/somurutilexej.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/buretava.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/4208171718.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/kebidiriv.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/39705890043.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/mopimim.pdfIn PDF document text
    • https://doanhnghiepvietnam.niengiamdoanhnghiep.vn/img_duhoc/files/73505583384.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/31153310203.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/434ba25bc2a7271a608ca1ac90cbcb4c/kizata.pdfIn PDF document text
    • https://kueapem.com/contents/files/55761809303.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9e38df0ea---vozipagutomarevumujezisob.pdfIn PDF document text
    • http://cukorbetegshop.hu/files/1684270870.pdfIn PDF document text
    • https://coil.hk/upload/files/wokaditutile.pdfIn PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/vumobit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=legally+blond+musical+soundtrackPDF 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_off0000f0b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CB 18124 bytes
SHA-256: c091bd3b92de031eb357e2906616b95bcb9acb55802f2c0418338c9f7a017ad9
font_02_sfnt_off000137ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137EE 11116 bytes
SHA-256: 2e02445cd795a67b62fb5596917853fd5f39c39341c7f52137f19c446192b3a7

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