Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc473b2c5e15f48…

MALICIOUS

PDF

72.9 KB Created: 2021-09-12 23:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5f419b5567f4734f4f2225a9b1bcb120 SHA-1: 577cea2441a7287340fe32ac3da4e0437161b024 SHA-256: 3cc473b2c5e15f48345d40f8acbbc05cc64601ded3af7ccd11b11e5a518ede4f
196 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. The presence of a 'Fake CAPTCHA' heuristic indicates the document likely attempts to deceive the user into performing an action that would lead to the execution of a malicious payload, possibly via embedded JavaScript. The document also contains numerous links to external PDF files hosted on various domains, suggesting a link farm used for distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://landbondcorten.com/attachment/file/d43977727a9baeb1d3a5da8047e77742.pdf In PDF document text
    • https://airbays.com/userfiles/file/35034247112.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/92718243723.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/69895145829.pdfIn PDF document text
    • http://talleresjpg.es/img/file/mobokuligul.pdfIn PDF document text
    • https://ms2oke.com/contents/files/8252811099.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/6bk1vf8u6a3unifc745etiep55/garezu.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/amlkd9ji9f1j0aivpe6ujsk1k2/purejegodeligojiwajosa.pdfIn PDF document text
    • https://jasmijnbloemengroen.nl/userfiles/file/39920645209.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16132ef2571959---kigupudonatazoguputenefu.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/nutuzujogose.pdfIn PDF document text
    • http://nhadep30giay.com/uploads/image/files/didanikunutasokusina.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613473cd352ab---diletalazolemefokukob.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/40021365686.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/99215004519.pdfIn PDF document text
    • https://ppntassone.it/dati/upload/file/vutinusanutovegunufo.pdfIn PDF document text
    • http://gestioniarmatoriali.it/puseg.pdfIn PDF document text
    • http://2safe4u.cz/UserFiles/File/pazivawimovulal.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138821b8bf6c---36766956132.pdfIn PDF document text
    • http://epmachine.ru/d/files/90586013281.pdfIn PDF document text
    • http://ecohouse-lab.de/userfiles/file/51429013639.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=splash+music+apkPDF link annotation
    • https://mediaget.com/userfiles/files/25297199295.pdfIn PDF document text
    • 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_off0000ba70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD282 17096 bytes
SHA-256: b6c0e861b988abc3c867087f7a7f9657dad0d4ff29adccf6efdd9e4713be6792
font_02_sfnt_off0000feed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEED 10352 bytes
SHA-256: 0d7e6b2c0b2697a678132616257fe73024c6021af46be6a4b4652249c4c5a5d1

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