Malicious PDF — malware analysis report

Static analysis result for SHA-256 055a6fa3ee9d40ed…

MALICIOUS

PDF

84.8 KB Created: 2021-09-06 03:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 29c41c128c484024197f09151b8d4d1b SHA-1: a8f0e3ad1146ac95a127358eb1e899f4d7e1e746 SHA-256: 055a6fa3ee9d40ed389001ceccc6976518636e12341af17bcc1be287663fafa2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous compromised WordPress sites, suggesting an attempt to distribute malicious content or conduct phishing. The presence of external URIs and a link farm indicates a likely attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e50263cf3---gawel.pdf In PDF document text
    • http://huh.hu/UserFiles/File/41175400033.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6ba30503a---zowigazagijaxiwoxupifun.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ad919e8bf60---32198101202.pdfIn PDF document text
    • http://stonepigments.com/userfiles/file/48812250124.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160758120a5e8b---35944183497.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/83604082471.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/ccs82vk7gb3e56ffj748jmdm9g/mudajomur.pdfIn PDF document text
    • https://12tiga.com/contents//files/40639430228.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/dbhv392nqoib1qjfssp2p48rs5/waxufesutetizo.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/96330765192.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/sotipabavi.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609962bf17a65---86064545127.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/41015737931.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c379473593d---nulesuvonunozoxi.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/141ed42e67bddc1b2197f024f18c111f/gedopokukeku.pdfIn PDF document text
    • http://adveotec.com/img/file/lifagasiritit.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b36c6a0a48c---xinupizimi.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/fd9463f7961e80eea5466163f01400a6/wolotuka.pdfIn PDF document text
    • http://refpecsbelvaros.hu/kepek/files/88768876734.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/wisosogifidebevi.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/52c58c2b96a67b7633bcdbecfe31ef9c/jaxalubejegul.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/95621662908.pdfIn PDF document text
    • http://briarcliff68.com/clients/71184/File/tozekevizoputuvinoba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=micrologix+1500+plc+manualPDF 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_off0000ded2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED2 10824 bytes
SHA-256: 05eca74d351551045c391f29e5bb695dce894eaf11977ad5b53b60050641ee6e
font_01_sfnt_off0000f7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE2 20336 bytes
SHA-256: fe044118d518ef7b5718cebee09148f312dc26a8b3070a8c4780c9de544c38b0