Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1c7e11148ed1105…

MALICIOUS

PDF

69.9 KB Created: 2021-09-17 11:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 8ecb065c7a2197ff4e46a714d05485b6 SHA-1: b0db7bdbc55b0c161e5887d19c735e5b769b7d4b SHA-256: b1c7e11148ed110550a93be32eb00c3a9abaca94f6a6f135e30aed894b9d49cf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading malware disguised as legitimate software. The embedded JavaScript is likely used to facilitate the redirection or download process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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 https://pistant.ru/uplcv?utm_term=ludo+world+mod+apk+download PDF link annotation
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/161415def91f3a---radulalarapani.pdfIn PDF document text
    • https://maribon.net/app/webroot/files/userfiles/files/lasapifawidojagixupaz.pdfIn PDF document text
    • http://ain.proximeo.com/ckfinder/userfiles/files/milubal.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/duboxudizufetu.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/161374450babed---tidevozolevurisara.pdfIn PDF document text
    • http://thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/rigaboses.pdfIn PDF document text
    • http://urdu-hadith.com/survey/userfiles/files/sotuzilikanobekawopavo.pdfIn PDF document text
    • https://siangyun.com/upfiles/editor/files/nojukigudezod.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/rupegete.pdfIn PDF document text
    • http://shop-cartuning.pl/userfiles/file/kujojidofelesewux.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/358c2ad74c75d49cd53f93b85950ca60/xasijezixinugubizemefi.pdfIn PDF document text
    • https://sieuthigo.vn/upload/ck/files/85159417658.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/xososakak.pdfIn PDF document text
    • http://kerekesvillszer.hu/UserFiles/file/22731511227.pdfIn PDF document text
    • https://rm-parketi.si/uploads/papoxomejiruta.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/161325655cbcf7---37275604288.pdfIn PDF document text
    • https://nirmalujjwal.com/public/ckfinder/userfiles/files/21461145657.pdfIn PDF document text
    • http://screen.by/images/file/sadurebovowajodir.pdfIn PDF document text
    • https://linkevicius.com/upload/galery/file/63244540987.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/vogesevigitefufif.pdfIn PDF document text
    • http://huseyindurmuslar.com/images_upload/files/67737303969.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/77605178e4b126d62eecc70b51f41cf4/1881947544.pdfIn PDF document text
    • http://heizler.hu/files/file/foseribom.pdfIn PDF document text
    • http://hide-bo.com/img/tmp/file/xapoxexoludewexijaketa.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16133812b0118b---19861748521.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/363fcae88ba4a1a82e133b49e148997f/delor.pdfIn PDF document text
    • http://gelateriacool.it/userfiles/files/giziwitilix.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_off0000b5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE05 14544 bytes
SHA-256: 10aab56fb045a57f4ce7619dbfb25d814abee73b96ff40f7fde81ac3541a8fb7
font_02_sfnt_off0000f274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF274 10300 bytes
SHA-256: 3b1f8b060e94625be216bec6de68f31de252ac56800fd6db9999b6f9175b6568

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