Malicious PDF — malware analysis report

Static analysis result for SHA-256 921d76e2e949b587…

MALICIOUS

PDF

90.9 KB Created: 2021-07-04 01:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 5bd0c6db0f38aa6c4ae39448fe078641 SHA-1: 71a65a8fd216a2abba3a8b6dd56da74c6839021f SHA-256: 921d76e2e949b587b3469d3cbf985fe0eb426dfab62c132392586af6f88b8a3f
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of an IP address literal in one of the URIs further indicates a suspicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.pattyn360.com/upload/forum/files/28231371565.pdf In PDF document text
    • http://bannails.com/fckeditor_userfiles/file/8380105091.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/94820419617.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df28eaebc42---37643374541.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4194a76f6---6468357489.pdfIn PDF document text
    • http://mebell-city.ru/ckfinder/userfiles/files/fazijabeburiwopuluzofoje.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8fe7897c24---tewiwinavimebon.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9004cff0e---xalefuwarupunewesanurinov.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5eb42d31f---90094250749.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/famaximatakob.pdfIn PDF document text
    • https://universitecentrale.net/uploads/FCK_files/file/93650451973.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3071d57f1---wuwukivofek.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a6728eef7---18817808785.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/kowatabol.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/ph59f8tuohutgekbh5bpp0s6ga/nojejapo.pdfIn PDF document text
    • http://focostrade.com/files/20210613185859.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/taxajisidoledap.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/b3o2s44lokv0ujgum0b58jrm1v/nakuvofutatupawekaduwew.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/zemokema.pdfIn PDF document text
    • http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/34261584678.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160811c60775e8---gokixesuzifexotox.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/ca60a0f735eab7959852eac6f6a3a64d/berirudivasisaramunimoko.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c778ed6af29---nojelibefoseboxogapem.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16098444351a5b---33612030455.pdfPDF link annotation
    • http://wjvanderheidedienstverlening.nl/uploads/file/73360684211.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=instruction+manual+for+sharp+xe+a106PDF 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_off0000f80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001101e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101E 20760 bytes
SHA-256: 72c15af61e765ad4a020a95a3b6a8988de765e175be44bcdfee799e55bd6d56c
font_02_sfnt_off000143f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143F1 11240 bytes
SHA-256: 57fdec9ed84388cbb0a8fe327954a2a916137e0cb2a5a4b12876dcc2558bef4d

Open this report in the interactive analyzer, or submit your own file for analysis.