Malicious PDF — malware analysis report

Static analysis result for SHA-256 5013830742aee0ed…

MALICIOUS

PDF

157.8 KB Created: 2021-07-25 15:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 56be30e13d5b1f7000a2485aa015e481 SHA-1: eb2fdfbd45a4762e868ab71a5c0ad7d96e7a6643 SHA-256: 5013830742aee0ed5b11f67ce953ec4cdfb064d9333f07f226ef2c3dd05188fd
196 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories and other potentially untrusted domains, indicating a link farm designed to redirect users. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the intent is to trick users into believing there are new banking instructions, a common tactic in business email compromise attacks. While no scripts were explicitly extracted, the nature of the links and the ML classifier's high confidence score point towards a malicious document, likely exploiting PDF vulnerabilities or using social engineering to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • 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://thesecurityguardunion.ca/userfiles/files/vuwadikigabipuzu.pdf In PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab77dcc840---lobikeveromag.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/92215507127.pdfIn PDF document text
    • https://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/1ot22cr80k80qut2cbm9tlenf8/84256098805.pdfIn PDF document text
    • https://daiichigroup.net/uploads/news_file/weretifelaxogajerilita.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/eco0iqe620c125648lj6b0vk69/4193779230.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/9810b98c30a3a3564a605af744d5a92d/sexobumosowa.pdfIn PDF document text
    • http://klimagra.pl/images/wysiwyg_img/file/direnoxowagazenadow.pdfIn PDF document text
    • http://sure2trips.com/bot/ckfinder/uf/files/vurabeziwizofi.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/27825151778.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/bubaxufatesuku.pdfIn PDF document text
    • http://fitviewer.biz/files/file/48627748376.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091a4e194d23---97652787206.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbe9cec5d9---vidatuzikudin.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210723_195009.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/93930122489.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/75fec59099ae00338a5b0887f05eb35a/mozugudodozitow.pdfIn PDF document text
    • https://agape4u.org/userfiles/file/10329027541.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/ninebirero.pdfIn PDF document text
    • https://nulifeus.com/~nulife/userfiles/file/47723700683.pdfIn PDF document text
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/49192145904.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a20ef2e2733---6805546452.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/e7b0h5k8arvllk2r2l9h15d9c5/99600901679.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/joxujidexosa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=essential+cell+biology+4th+edition+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_off0002077a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2077A 11072 bytes
SHA-256: e58c3c68e98254981909ec01d004671e67fcd178210dc271b2a7e4f9105f6bcb
font_01_sfnt_off0002210d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2210D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002391f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2391F 18016 bytes
SHA-256: 8a3bddfbec9a3512bda138cd1f547048f0b205e6a4b93ba29dc97ea6509b8f2b

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