Malicious PDF — malware analysis report

Static analysis result for SHA-256 87671ba8bbc5532e…

MALICIOUS

PDF

79.1 KB Created: 2021-09-22 09:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 184fcb440859ba0d8c0086135d5fe3e9 SHA-1: 21f788d09bbcc7f751e7f78c10e459e762a24db6 SHA-256: 87671ba8bbc5532ee53b95d6e974fd39b3997e0319f0587382109b4b08d204d2
196 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. Heuristics indicate it contains a link farm and a lure related to payment redirection, suggesting a business email compromise (BEC) or phishing attack. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://reviewz.eu/app/webroot/files/userfiles/files/nokorubikalamurip.pdf In PDF document text
    • http://thomas-zigon.de/images/file/30489860516.pdfIn PDF document text
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/84847744939.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132a0186ca62---12460377544.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/45471449111.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/wepox.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/69346dc861fe451b70ba6b65496b839e/19285030190.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/tatipawubipososofofitatu.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/peverefisupupurejipile.pdfIn PDF document text
    • http://marienoellebermond.com/img/uploaded/file/domikebezudesaje.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/vixaladawudiduvetiziza.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/pifitixeg.pdfIn PDF document text
    • https://associazionemusicaviva.it/uploads/file/77910747538.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/32650945006.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/tugejagexo.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/napalibuginujepeka.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/64109267965.pdfIn PDF document text
    • http://jr-bang.com/uploadfiles/20210901202945.pdfIn PDF document text
    • http://finance-bulldog.cz/UserFiles/File/50021661387.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/2690eefe19ad751e380713a161be8ba0/71021755578.pdfIn PDF document text
    • http://www.itidharamshala.in/images/uploads/files/6631333018.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/24421843608.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=cheetah+keyboard+old+version+app+downloadPDF 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_off0000cfdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDD 11020 bytes
SHA-256: fa9dba4d329f6b201cac9fc953c3943dfa80fa52faae4cce88d744f0bda182ce
font_01_sfnt_off0000e94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10160 17540 bytes
SHA-256: 4493aa99e65fdfbf55a4787829c59490c905ec604313cbc77914baaa265e9a41

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