Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad7e08bb921f700…

MALICIOUS

PDF

89.9 KB Created: 2021-08-16 19:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4068b9abb18b6b2b2dbbf2c545ade80e SHA-1: 31cf3925182395001afcebd89e369a4ce3a30f0c SHA-256: 5ad7e08bb921f7009bb0c67ea7a5d6d6d2b07b2f5247f11ee516d60354e4a62f
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs, many of which point to compromised WordPress sites or link farms. The 'SE_URGENCY_LURE' and 'SE_INVOICE_LURE' heuristics suggest a phishing or scam attempt. ClamAV detection and ML classification strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to lead the user to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 8

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://catamma.ru/uplcv?utm_term=full+and+final+payment+letter+sample PDF link annotation
    • https://bloomeng.com/uploads/fafaganavovolowimedivifi.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd89660ebd---29502581903.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/2462794486.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608014fcc8d55---dufupuvilope.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/88b166dfd62a4cc810989b643fc424b5/mixugamifofokabuperemep.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c454a7b7c83---surogevofupuberuka.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/mowevipiromumanijavawos.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c58cf988734---31694770807.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607036d8d3ab4---6561106467.pdfIn PDF document text
    • http://mutamobilya.com/images_upload/files/bojeveb.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/n1mtkscvi18k9g6bgo7gp30n3v/mowomaxarukuleralonezitog.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607987f9276ab---nanirumigezokibusivik.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/f09bf5c499209f30b504e713715843b4/didevojotexazuzejemojozo.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609d28bb4d77b---10666376767.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075ea4b63809---wezevupuk.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa29fb3fcc---faluzawazi.pdfIn PDF document text
    • https://12waktu.com/contents//files/81042669032.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/85694153418.pdfIn PDF document text
    • http://www.golfusa.be/userfiles/files/54008642007.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/82953976445.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/l9al01vi2r4jpvdrcq27ttdomp/31966221729.pdfIn PDF document text
    • http://bluekeydigital.com/images/pic/file/lixinanudolowisariva.pdfIn PDF document text
    • http://katachizu.com/img/news/files/tozebudo.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/64243758616.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/11485835469.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010f1a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10F1A 18592 bytes
SHA-256: c32c792ee2bfe14cd290d3d1768ee646c810f3e6e9a328503813bb5ff75e16d0
font_00_sfnt_off0000de76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE76 10728 bytes
SHA-256: 92bdc0bbd4233d160735eefe108d509ec476c196159e5b44079cc07ffdde469b
font_01_sfnt_off0000f709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF709 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C89 17156 bytes
SHA-256: 593d0a6b4d870f334cbd9b9f31cebccd05cd315d399390493bb476094e9acd2a

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