Malicious PDF — malware analysis report

Static analysis result for SHA-256 87cb2da1e462fb4f…

MALICIOUS

PDF

92.8 KB Created: 2021-07-18 12:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: c4abe799e6fef442a652812f6e186415 SHA-1: 6dd495d57494214a656de0c5843e2ec7c892c4e6 SHA-256: 87cb2da1e462fb4f5d069a438b6b530b4e67f96c084369f927607538f54d4093
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by ML classifiers as malicious. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document's content likely attempts to trick users into changing payment details or accessing fake financial portals. Numerous URLs were extracted, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/ndc5onhegmlu7ihv5kb6j7in6p/batevotub.pdf In PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/49617013298.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/funukevajefosazetejag.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160820ffb7d267---80713959424.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cdbeb2ff8---39434109184.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///43244533843.pdfIn PDF document text
    • http://honyi.tw/ckfinder/userfiles/file/90863382988.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa58d1cb651---4487367001.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/k50pq15r16gc3k7kt0aap4gvqv/vijiwenadovufeguxilezem.pdfIn PDF document text
    • https://boyanbolyarski.com/userfiles/file/nuvabaxagubamesivazexat.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/6cl7fgm25qev69cnb10ug6bsma/81732478255.pdfIn PDF document text
    • http://dzbnf.com/upload/file///xutifeduxogazukes.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b72b55c52e7---debifobezokapatinadux.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/rasin.pdfIn PDF document text
    • https://rkdestate.com/userfiles/file/65447096651.pdfIn PDF document text
    • http://chhsclassof70.com/clients/1/1f/1f6d1b94cf555b90b9f410dfa82aea5f/File/gekinajo.pdfIn PDF document text
    • http://aa-nusd.jp/93163054728.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160713ff874859---20034498171.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e108b550f---zodiwepi.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/66251980618.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/187nhcsqaas5ol6su59hliu3s3/52352408593.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/6487796769.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/susinufivusizuzadefagis.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/45180836777.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=check+my+lottery+numbersPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ece9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE9 16348 bytes
SHA-256: b634a75c87053d59e309edb0b79a31c4dca5d92558761db9bc2a76d926902feb
font_01_sfnt_off00011755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11755 10716 bytes
SHA-256: 85019d060524428cd5c8615a6f5f761101ce7195523b9f28dd980eb5a1e5e1f6
font_02_sfnt_off00012fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD2 18460 bytes
SHA-256: fcff71724a561532230f805b9e17ccbd555a4faf1145a1d9eb1c5b5909f6b08d
font_03_sfnt_off00014d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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