Malicious PDF — malware analysis report

Static analysis result for SHA-256 2efc45486527a53a…

MALICIOUS

PDF

85.6 KB Created: 2021-09-17 04:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 06add66002f947d7c05f0e03aed5dfff SHA-1: 41d69a5f49b521b6932f213e1a00865a7b43e1a6 SHA-256: 2efc45486527a53a13e16defd2e628e029156de164edeef39a5117a1a8341b17
174 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect users to malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may be part of a multi-stage attack, possibly involving a password-protected archive. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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://huntic.ru/uplcv?utm_term=dnd+5e+players+handbook+ebook PDF link annotation
    • http://yotlist.com/uniformkontakt/userfiles/image/files/99902209802.pdfIn PDF document text
    • https://brihat-group.com/assets/userfiles/files/zadexufoliguxugewuxobo.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/91976067383.pdfIn PDF document text
    • http://lamekatus.com/uploads/ckeditor/files/pigufosafider.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/vobukek.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/wugabafi.pdfIn PDF document text
    • http://boldino-hotel.com/ckfinder/userfiles/files/402308143.pdfIn PDF document text
    • https://lasanisports.com/files/julubixolosizirilim.pdfIn PDF document text
    • https://cheesykeju.com/contents/files/63834502274.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/27099350468.pdfIn PDF document text
    • https://kurashi-kyoiku.com/cms/dat/upimg/file/dosaporuji.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/tidad.pdfIn PDF document text
    • https://www.khaosanpools.org/ckfinder/userfiles/files/51062601846.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/161313ef7b65fc---83703074787.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/28872587364.pdfIn PDF document text
    • https://sudhirsachdevaclasses.com/ci/userfiles/files/pixigogufejerenoburu.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/rimofodoxazobixad.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/wivovimevirumajix.pdfIn PDF document text
    • https://zohopinler.com/calisma2/files/uploads/26668230697.pdfIn PDF document text
    • http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/magilawirixureralaraxur.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/53182430716.pdfIn PDF document text
    • https://bluetact.com/ckfinder/userfiles/files/3903079164.pdfIn PDF document text
    • http://vektorma.ru/uploads/assets/file/62336783418.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/vedijasojiw.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135bcec5f626---58469238528.pdfIn PDF document text
    • https://tradegateindia.com/userfiles/file/40719759217.pdfIn PDF document text
    • http://chikatere.com/Upload/files/96549730531.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_off0000e54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54A 10780 bytes
SHA-256: e932e3c66cfe858e19533ddc752560823ebf107e11d63814d260399cd55dcc6a
font_01_sfnt_off0000fde0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE0 19060 bytes
SHA-256: ac97e91d26c10f87408e3901100afd43420a107a018429eaa7f6ed0a9662f204
font_02_sfnt_off00013037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13037 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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