Malicious PDF — malware analysis report

Static analysis result for SHA-256 0997fa6050f2a93d…

MALICIOUS

PDF

75.1 KB Created: 2021-09-13 15:09:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: ef8e1077790249ad2134c5b68fe09b60 SHA-1: b97c0da5f2a64d67a741034fc74dfec3fe9b6651 SHA-256: 0997fa6050f2a93dde5b67198ce3201ef559313dbb711a81c47bbccc3efe09e2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of URLs, many of which point to compromised websites or disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=project+makeover+mod+unlimited+coins PDF link annotation
    • http://karat-dobremiasto.pl/userfiles/file/lakujimidisofivagodil.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/25778284642.pdfIn PDF document text
    • https://yourwebcenter.com/files/file/gifuwoxew.pdfIn PDF document text
    • https://zenit-npk.ru/files/file/19274731991.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/73a3ff35a8e038d6466b9b7f79880d95/72197466971.pdfIn PDF document text
    • http://ckud.handysociality.com/upload/files/52394970092.pdfIn PDF document text
    • http://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/nosaribajane.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/92791816700.pdfIn PDF document text
    • https://mk-promotions.com/ckfinder/userfiles/files/fagumex.pdfIn PDF document text
    • http://zjnep.com/ckeditor/ckfinder/userfiles/files/joxubuxovijofavizepo.pdfIn PDF document text
    • https://jgranit.pl/userfiles/file/lesakofisip.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/478c8db85a3797a1edcf64aa32a5e9d9/xuzatubakiwesepe.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/25133097508.pdfIn PDF document text
    • http://snoman.mb.ca/ckfinder/userfiles/files/12648799587.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161362bd86531b---resoxolegeg.pdfIn PDF document text
    • http://damosushipleasanthill.com/uploads/files/74332951897.pdfIn PDF document text
    • http://votejoedestefano.com/editorData/file/79010144877.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/202191918505796.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16133aa7523085---gufesetipisojokejinozoji.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/79358912980.pdfIn PDF document text
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/xavexifisobaseteseru.pdfIn PDF document text
    • http://africalegal.nl/userfiles/file/zepaw.pdfIn PDF document text
    • http://realestatemiami.com/userfiles/files/vutexi.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_off0000c35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC35E 10920 bytes
SHA-256: 73101d21faae050c91304efe05c33f164a2aacec9a15e241e77b0bcae5825ad0
font_01_sfnt_off0000dca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA3 16500 bytes
SHA-256: f73831ef719874ab3c38b5398cb233647bddbc7109c4f830a4983aa4175a321a
font_02_sfnt_off00010672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10672 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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