Malicious PDF — malware analysis report

Static analysis result for SHA-256 d018eb0569939d07…

MALICIOUS

PDF

75.9 KB Created: 2021-09-08 07:13:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e5f6ce629cec84c3bb94d7c89bfbdd43 SHA-1: cfdcf62b2becba0289d4620e464371ef24ac562d SHA-256: d018eb0569939d07cd8ea25be49593b8712ac3b021b9742875245db8bcae3d1d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites and other domains, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and the nature of the heuristics indicate an attempt to exploit users by directing them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • 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 http://truhlarstvisollner.cz/data/file/20670352947.pdf In PDF document text
    • http://easytravel63.ru/ckfinder/userfiles/files/38894519558.pdfIn PDF document text
    • http://npas.ru/pic/file/vedadaxesidekitowa.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ad035165d29---somonasimufomudavede.pdfIn PDF document text
    • http://carolinaboatclub.com/userfiles/file/21528191475.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/ver1eijpmeubnl38f29hck113g/65961310939.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/1974994627.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/48455959089.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/72068158296.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073539f6ce79---93283616770.pdfIn PDF document text
    • https://amthanhanhsangchinhhang.vn/upload/files/46507047219.pdfIn PDF document text
    • https://granitnet.hu/editor_up/97380371552.pdfIn PDF document text
    • http://solmoda.it/userfiles/files/45962510756.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/geget.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612764bc24c4a---lifomam.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079b2b1a490e---namusobediresafamabo.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/guvumuruwidekanavunadit.pdfIn PDF document text
    • https://asesoriagade.com/app/webroot/files/files/45132487456.pdfIn PDF document text
    • http://hanilkwanla.com/uploads/files/juxuxirogif.pdfIn PDF document text
    • http://saipanbooking.com/FileData/ckfinder/files/20210822_64A186AE6064D781.pdfIn PDF document text
    • http://bkbflooringusa.com/userfile/abbey/file/pubumateko.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/76514325225.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/fubelopijezira.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=zener+diode+code+list+pdfPDF link annotation
    • 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_off0000c6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E2 10412 bytes
SHA-256: 04cc116d11b9963bd891392263dd698cc731c9f16bd521f8eff23331efb3ae26
font_01_sfnt_off0000de96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A8 16876 bytes
SHA-256: c0c020e763400ead3d24344aa91de50010f16430b9ad39ed9e515ed2e9d7e993

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