Malicious PDF — malware analysis report

Static analysis result for SHA-256 55560d567d9d6f60…

MALICIOUS

PDF

82.5 KB Created: 2021-09-01 12:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 76ddda9f75cda5d2736192e55e439212 SHA-1: 2f4e58e984fb8aae973dc2642a93a600122f4967 SHA-256: 55560d567d9d6f60dc626672c3fd7462fa2063f9df038629b9e13f9457fd4705
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The file's structure and embedded links indicate it is likely part of a spearphishing campaign aiming to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/eb1769f85d20b960f503f3a4e8d9d164/lumovubobuf.pdf In PDF document text
    • https://idealist.ro/userfiles/file/ladafezogekifurupib.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/5755707435.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c77c86c52b9---gibedakikuxudakidimaropoz.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/p4jedvgi9n33ht8u4r7qf1gcd1/jedarewobenenimigopaba.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/wugavamom.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/7d81d0eab31782312cc18d0942a91d56/61527986808.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/69975019081.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/ropixudujila.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/97088809442.pdfIn PDF document text
    • https://cafesca.org/ckfinder/userfiles/files/37026172468.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac58bb16b8b---53499340667.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c6eb0610511---vizuwepurujiwaxuka.pdfIn PDF document text
    • http://954move.com/clients/4890/File/sadererisasekoretiwobex.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ml8gs1a8ikj937a9i52kgc8417/54166184698.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/7d616d0aa5721214a5310c222e89ffd7/78326404357.pdfIn PDF document text
    • https://eastmangroupllc.net/ckfinder/userfiles/files/dogijebesudulipifuwo.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a00318ba102---57860828078.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210702/file/16251681974228.pdfIn PDF document text
    • http://gsmontaggi.it/userfiles/files/vazivowix.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///37064661976.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/pajutuz.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/50105866672.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/59100100444.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/c8kcp7nh6de9q6f5vtnfsulepo/73891884522.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=cremate+in+malayPDF 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_off0000dec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC3 10128 bytes
SHA-256: 910ca490d2017f36553bf48bedc925524ac99d6248c25c7fbc1759137e13b4b3
font_01_sfnt_off0000f555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF555 18188 bytes
SHA-256: 38bd54094c4476d4f79e51ac79e0378d5f3985e7f5ff716f79fc605a65d7a2a9
font_02_sfnt_off0001241b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1