Malicious PDF — malware analysis report

Static analysis result for SHA-256 e11c72ceb7d23c7b…

MALICIOUS

PDF

82.8 KB Created: 2021-09-17 18:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: edd3ae07c50a62f06f0da089a85da657 SHA-1: 97f0081ce0401086ddedcb5e8274cf093d2ee138 SHA-256: e11c72ceb7d23c7b3b8e4ef3c7d001f21c834c5f9461d1ce112c5ff130144f26
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it is a link farm and a lure for invoices or payments. While no scripts were directly extracted, the presence of numerous embedded URLs, some pointing to compromised CMS uploads, suggests a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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 http://music-summer-courses.eu/upload/files/86697977850.pdf In PDF document text
    • http://gancza.pl/userfiles/file/40152425930.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/75cad705d4bda6d24ceccc4488ce3c84/12892368311.pdfIn PDF document text
    • https://www.domaine-vrignaud.com/ckfinder/userfiles/files/dozax.pdfIn PDF document text
    • http://icloudcleaners.com/uploads/account/autoresponderfiles/48926604072.pdfIn PDF document text
    • http://abwrva.com/uploads/files/gavivonivadukubuguzorug.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/gosasiduxomo.pdfIn PDF document text
    • http://moscreen.in/cmsfiles/file/4516088425.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/mepamigakelukukejan.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134dbe86364b---1470667217.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/dff8c035f21063b2a25622ec6760563b/31343250610.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbae1927f2---93352868095.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/katawilabuwuvetojizopagu.pdfIn PDF document text
    • http://textstricker.de/benutzerdateien/45886848025.pdfIn PDF document text
    • http://dalaichau.com/files/vugati.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-9/file/ludumelog.pdfIn PDF document text
    • https://brtim.com/uploads/wysiwyg/files/nupudal.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/a8374ao9dcql9toic20rtvp763/tonofinefolezosuxivez.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210915153500.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/14691284537.pdfIn PDF document text
    • https://tolgyesvolgy.hu/userfiles/file/nukusasitib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+to+access+private+instagram+accounts+no+surveyPDF 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_off0000dc9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9E 18132 bytes
SHA-256: 8f34065609d58fdeaabc93ec706840ce6b2f1ec9eee14c5d7086127ae2b554a0
font_01_sfnt_off00010baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAA 11028 bytes
SHA-256: b4f1c17a9f4fa69c0f58551d23923c539a9ab975b6dcf27864b1b63eb4ac39d1
font_02_sfnt_off00012569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12569 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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