Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fea6e7436773395…

MALICIOUS

PDF

85.3 KB Created: 2021-08-08 01:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: dc67ef583ed9f0b66706d45f6725b1fa SHA-1: 9784e238d8029e18d8c7a256e3a3fcab1d18587d SHA-256: 6fea6e74367733954707d16c7f369543b97d0cc6d7030b5ab714684787746f37
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, and contains multiple links to potentially compromised WordPress upload directories, suggesting it's part of a link farm designed to host malicious PDFs. The 'SE_INVOICE_LURE' heuristic indicates the document's content is likely a fake invoice or payment request to trick users into clicking the embedded links. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/a0f0ba25bb500fcb3c555ea89c7f53d4/88974073998.pdf In PDF document text
    • http://godswaynehemiahmbc.com/clients/878002/File/kuvesapojojofopa.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160c94743c992d---majigunapidasepifezu.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/latitadi.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/4d4b316f25952d7134c451f3249a5060/35880560475.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609170d3ae0e3---dorolek.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724cd10c188---49480729828.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/53679270118.pdfIn PDF document text
    • http://vonschickenconcord.com/uploads/files/49147244025.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/nirigefojotoxakuwunofopi.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/zedexitesotabitum.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/36941622084.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16089c7911ca40---kovogebitowiboxixe.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083fb608316e---14364297223.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a3aa2bb95---63398063251.pdfIn PDF document text
    • http://protok.pro/upload/files/57558365125.pdfIn PDF document text
    • http://eros-arena.de/eros/userfiles/file/80171071253.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/57533722842.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/12365708884.pdfIn PDF document text
    • http://szrealty.net/uploadpic/2021-5/file/2021053004255073499.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/ipl14i872s158qdapjc3ah7oi4/taxolukidewinob.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608409f19a43d---kijix.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/jixuxakideso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=i+don%27t+have+a+voided+check+for+direct+deposit+chasePDF 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_off0000ec75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC75 16124 bytes
SHA-256: ca08dc7914192e52e49690b5e631a323e4b28899612deec9d8ec367d10c06531
font_01_sfnt_off000115fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E11 10812 bytes
SHA-256: 0a19aa19bd1ecae6d223d1681c5134d7af5062adf818ce1b21c91496c47b3e2a

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