Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d0edebb039cf398…

MALICIOUS

PDF

85.2 KB Created: 2021-09-03 10:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 89488b70b6d7b1d9681e4516163ff0be SHA-1: c22f43c04aaf655e064f77e188243cc282dc5064 SHA-256: 5d0edebb039cf398bb22b9972a12a2471b2ac91e533914de877954797a0807e6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a large number of external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the presence of numerous links and the overall heuristic profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa20e0d1355---toxabuzami.pdf In PDF document text
    • http://olynskiconstruction.com/pics/file/zujefefaweroberube.pdfIn PDF document text
    • http://merklink.nl/site/data/ws/files/benomakowowedezabo.pdfIn PDF document text
    • http://gaziogluenerji.com/images_upload/files/2679114695.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16082384c3c122---29806553513.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/81209535998.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1739d957c---48419170575.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084bfd703d9d---metozaxazip.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/13282318382.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/093e668777b4699f511e27ee43c1cda9/17445512031.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/bf943cd7ce8e997cc6ac6c87e7c2298b/42281642524.pdfIn PDF document text
    • http://dorinhawear.com/admin/fckeditor/editor/filemanager/connectors/php/fckeditor/editor/filemanager/connectors/php/userfiles/file/xulugajigalakotatujedanon.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/47813531484.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608933dcefb68---8745207047.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/28446921684.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a3abc2941b8---mawaravafifuvekigum.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/07fa16b3cad4d676e9823a7537e819a6/19943329109.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/161238aa0a46ff---pizigigatalifafo.pdfIn PDF document text
    • http://tele-klass.ru/i/upload/files/pogiziv.pdfIn PDF document text
    • http://maychebiengoduykhuong.com/media/ftp/file/labofabuxemifesutopasawov.pdfIn PDF document text
    • https://aletihad-group.com/userfiles/files/22438735844.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=mind+without+fear+rajat+gupta+pdf+freePDF 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_off0000e827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE827 17588 bytes
SHA-256: c5926babb506f201f7a77753d5a8fbbc03e382e1326614747db9f4bb56ea06b3
font_01_sfnt_off000115cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE3 10872 bytes
SHA-256: c7ba93085b5e5e17fb410724942cc6abe4072417f021342eaa7a8d26f372f6d5

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