Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e6974e19d437a6…

MALICIOUS

PDF

71.6 KB Created: 2021-10-02 16:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 2f11efb2c272acbf884bd389b10d0274 SHA-1: 139bda1d0801df2ebd3af36778ca66d259a34bfc SHA-256: d0e6974e19d437a6d80a592c3dd27e0a631e4d6b9aa120ae87eaba820dadf1f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads or disposable domains. The presence of numerous links, including one with a 'utm_term' parameter suggesting tracking, points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=dhoom+3+telugu+dubbed+movie+download PDF link annotation
    • http://xn--2o2b17g32e8xisqq.com/userData/board/file/14518110409.pdfIn PDF document text
    • https://tranthachcaodanang.thicongmaiche.com/uploads/image/files/16662539678.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/xamega.pdfIn PDF document text
    • http://whatcanidoforyou.eu/publish/file/51028400073.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1614b6cd89eef7---tawafugez.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/sozixife.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/7741382611.pdfIn PDF document text
    • http://klinok-saintp.ru/files/97306440173.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/fudixisesipivazomi.pdfIn PDF document text
    • https://xn--49st2et51duvk.com/upload/files/bisuf.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/49307178633.pdfIn PDF document text
    • https://nichecnk.leaddeehub.com/userfiles/files/5010516430.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161464400256fa---durot.pdfIn PDF document text
    • http://kaymccarthy.com/immagini/file/73303572224.pdfIn PDF document text
    • https://praktijk-fix.nl/userfiles/image/file/51409722154.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/6afuum9tltlfefbkf9vnghbp03/79556634896.pdfIn PDF document text
    • http://spokoino.ru/i/upload/files/tobokonusapipadunaxerab.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/zegej.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/161537c1724648---retetadowubevesosu.pdfIn PDF document text
    • http://online-cycling.com/files/file/29915125778.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/sepudevug.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_off0000af15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF15 18756 bytes
SHA-256: 62a330b776d47ed010734c09095e2d3af1f7ac2440fb765257c4eca43e99a688
font_01_sfnt_off0000de1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF632 10992 bytes
SHA-256: de1d7e52bd6e5869674370d0bcdb8b916769b5559dcdfb50a6f5a1568bc674b4