Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba02246aea3ee8a…

MALICIOUS

PDF

82.0 KB Created: 2021-09-06 14:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: da651a2c0e7cd12806bae9fefb72f753 SHA-1: 1505ed60621109ad743c0c013a2953c87105569b SHA-256: eba02246aea3ee8ab68cd71de1aafa787e33dc7eae4ae97d783c90972364d476
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://chcial.ru/uplcv?utm_term=piyush+gpat+cracker+book+pdf+download PDF link annotation
    • http://londonjip.com/userData/board/file/75422609991.pdfIn PDF document text
    • http://luxe-pools.fr/i/File/94488902289.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/5520403472.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6f1479d319b9b23e70ba0536022724de/85113907150.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e795372bfe5---zumedezokogezapireju.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/vph4hcbrnb2ong6nmpe8solh41/buvozegekazivuwaraf.pdfIn PDF document text
    • http://jx4d.com/userfiles/file/80679745689.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/707044f215f45cd05af8a57a28f60f5a/vijizerajob.pdfIn PDF document text
    • http://ahchala.com/img/file/wuniliduta.pdfIn PDF document text
    • http://garderoba.sk/images/_file/xogipaburonurebureruk.pdfIn PDF document text
    • http://islaminkiel.de/webmisr/uploadwebmisr/file/sokenikowakonow.pdfIn PDF document text
    • http://secondhandgraphics.com/usrfiles/file/29740703909.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/xidijase.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7d89f4179---rubiwav.pdfIn PDF document text
    • https://creativitagh.com/pevron/www/img/file/55502469781.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/647595ffbbdab094e35b0260d4877f9b/31817667202.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/zijajifugeganufusoraxovo.pdfIn PDF document text
    • http://grafordexstudents.com/clients/0/05/05b3dbe7dd9dc6f92b523d2b721f2ffd/File/47161994257.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/39822447069.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781c989e791---1527821803.pdfIn PDF document text
    • http://dh-cell.com/ckfinder/userfiles/files/12761800143.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a86f768cd08---xisagawefowirenizeg.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/24357559205.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_off0000d6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AF 11432 bytes
SHA-256: 359c00041563dfdd95dba6cc2b14e7db00c36cb9ff62e4b6eabc9d25945d446f
font_01_sfnt_off0000f152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF152 18588 bytes
SHA-256: 3be510a2a6f998c9d1c70afe34394c8c0b72282905d38b6d6cfdfcd02fa9cdba
font_02_sfnt_off000121fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1