Malicious PDF — malware analysis report

Static analysis result for SHA-256 e76234cc2cb3efb6…

MALICIOUS

PDF

171.2 KB Created: 2021-09-08 05:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fae8e18bd9214ed5af66d75174600be3 SHA-1: 786980ef494dd80fb4642e69f692adb521a3a571 SHA-256: e76234cc2cb3efb67ada6d7e189a42e44aadd6b0b0c68d064aad81265c876698
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely to distribute further malicious content or phish users. The presence of multiple PDF files hosted on these compromised sites suggests a multi-stage attack or a distribution network.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://historico.uts.edu.co/portal/app/ckfinder/userfiles/files/jejexudago.pdf In PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/38794872578ab8aab73bac36910aa70b/19694627329.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/kenatesifafikugegemi.pdfIn PDF document text
    • http://szcftz.com/upload/guler.pdfIn PDF document text
    • http://hopkins1983.com/clients/861771/File/natitexag.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/fb3b1e6b308cab8a45ea663565c1f7bb/12483211350.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/79090342807.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607620471b446---majabadi.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/am06bes3vr4hudp2p5fre4plj0/67393823458.pdfIn PDF document text
    • https://akemi.ro/hirek/file/47036076701.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/96879576822.pdfIn PDF document text
    • http://lobanowscy.pl/userfiles/file/golikid.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160acd02a52071---7874194972.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/10620914645.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/23764656644.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b165dc9fd25---dotatu.pdfIn PDF document text
    • https://www.cascatai.com.br/ckfinder/userfiles/files/29586994822.pdfIn PDF document text
    • https://satnamunicipalcorporation.com/admin/ckfinder/userfiles/files/tibupujedatagepuxep.pdfIn PDF document text
    • https://henklinders.nl/henklinders/upload/files/dagosigarejefamat.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/c65fc72b11961f71a5882c82490f065c/72765191454.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076700c7ee9b---46092608506.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/38110289992.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/19361224240.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/qmhbrbdrsptje22pbpp29b9epg/46144058102.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c525f9a269e.pdfIn PDF document text
    • https://cordovajewelry.com/images/file/17206048164.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=avicenna+canon+of+medicine+english+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_off00022640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22640 28640 bytes
SHA-256: 27e233f1c36c90cad0df1b2226d5073ec4ce5a68ef613b7f999d69ccbadc9617
font_01_sfnt_off00026d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26D27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002853e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2853E 10916 bytes
SHA-256: 081b215c5c73bab174e5842e47bdd3ffa352dee72c60a7e7badb8f131946828e

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