Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb19f021cd40654c…

MALICIOUS

PDF

83.4 KB Created: 2021-09-07 18:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 113f927b5e11936180e33f84d7833356 SHA-1: 594fbc65315a75809b4daa73c654248453b96be9 SHA-256: bb19f021cd40654c471da8772ca155b5aefbdcf0729b1c666fcd234a9085fcfe
196 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, a common tactic for hosting malicious content or redirecting users. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the intent is to trick users into changing payment details. While no scripts were directly extracted, the PDF structure and URL patterns are indicative of a phishing or social engineering attack, likely leveraging an embedded exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://allprintusa.com/admin/images/file/96781892027.pdf In PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090872409ff1---73193210501.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/65261727289.pdfIn PDF document text
    • http://quangphong.vn/uploads/image/files/46324015908.pdfIn PDF document text
    • https://qigoodteam.com/uploads/files/202108152246428409.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/94733259321.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/vitegedalara.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/beguwel.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef2cd38691---nowidipixogut.pdfIn PDF document text
    • http://tetraeng.it/userfiles/files/zevizagojuwamepusuvipanis.pdfIn PDF document text
    • https://fallsplat.se/file/dobarepesirejipojalugida.pdfIn PDF document text
    • http://fitviewer.info/files/file/rikosugobaj.pdfIn PDF document text
    • https://digiconelectronics.com/media/50120673234.pdfIn PDF document text
    • https://777mto.org/contents/files/gonesapu.pdfIn PDF document text
    • http://www.catedralirodahaz.hu/data/editorfile/59657541232.pdfIn PDF document text
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/db94c56feb164388d0fa636245ed5d7b/94781672015.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/61672889406.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/529bbcd93d12b024f6e4d82f8a996437/nodezep.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609bea3ad9451---ziluxubivi.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094cc62a1d62---26443144223.pdfIn PDF document text
    • http://artside.org/data/temp/file/77532369100.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/8547836513.pdfIn PDF document text
    • http://tvcsoltau.de/userfiles/file/99634615031.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=manual+de+usuario+suzuki+swift+2017PDF 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_off0000d786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD786 19496 bytes
SHA-256: 82206e259dafcdb7cff5a95ab9be0550b13ed86865a7e9e151259ad23e2fd2f9
font_01_sfnt_off00010b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A7 11024 bytes
SHA-256: 2de53356fb88d0f18cdcde525bf633aaa666fea70fe3a775325c008df1da1237

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