Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e2efe34a5b6174…

MALICIOUS

PDF

81.4 KB Created: 2021-09-17 12:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ba59c326358e6f9cbee0ddbeb5a2d89b SHA-1: eb47cbee09f8b0da47ffa487c47fb0eaf9649ef1 SHA-256: 14e2efe34a5b6174220bb959f5d270fbea73a9b5e901f482e85d8efe1e82f348
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is a common technique for delivering malicious content. The heuristics indicate that the PDF acts as a link farm, directing users to various compromised websites and potentially disposable hosting, likely for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://philabc.ru/uplcv?utm_term=960+fps+camera+apk PDF link annotation
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16136e70dd5125---sapojetimetiw.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/furigawotujevuvo.pdfIn PDF document text
    • http://dexgerm.com/data/file/userfiles/files/50179200016.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/6636200187.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142c50153bc8---virubajawinewesubag.pdfIn PDF document text
    • http://mylodge-naoshima.com/15106120270.pdfIn PDF document text
    • http://xn--989ap7r0xbd5x.com/upload/fckeditor/file/papudijebiwovejezuwive.pdfIn PDF document text
    • http://mtjjt.com/2013/upload/article/files/210907025228286094o7tb6.pdfIn PDF document text
    • http://socukorglutamatmentesfuszer.hu/ckfinder/userfiles/files/31722147469.pdfIn PDF document text
    • http://kozhencherrymtc.org/userfiles/file/42357186818.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/78775078141.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/temudedeke.pdfIn PDF document text
    • https://combrooncom.com/contents/files/39259194289.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/161444ab7878c5---nuloleteguxeg.pdfIn PDF document text
    • http://goodlack.cz/userfiles/file/fefabuzasebi.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/zovabeves.pdfIn PDF document text
    • https://clubberia.com/js/ckfinder/userfiles/files/zokogo.pdfIn PDF document text
    • https://reaga.net/js/ckfinder/userfiles/files/nakibaguvidab.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/tewineve.pdfIn PDF document text
    • https://digireg.com/upload/56840757850.pdfIn PDF document text
    • http://coolbiotech.com/upload/files/18681765302.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/97880571554.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/73141050662.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_off0000d5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B5 10636 bytes
SHA-256: f995334e230aff3468514372a43072f90cb0e2de657ae440ee01ba217331006c
font_01_sfnt_off0000ee07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10619 19320 bytes
SHA-256: 07ac50f17d1178938db9f94337c619b658ffc72ef53fe33533205d49ce75b454