Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6d335ed443f3a16…

MALICIOUS

PDF

85.3 KB Created: 2021-07-05 10:28:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: f3b847f6e0c7bd9f9117e0d336f3b16e SHA-1: e1274f87df3707058d7700f4ab49fca5d2360be4 SHA-256: e6d335ed443f3a162984c3d5821e949f32e751609d53117dcefceef7ee6a2aec
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lure users to potentially harmful content. The presence of multiple external URIs and link farms points towards a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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.
  • 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://begemot-rus.com/uploadfiles/file/2021061718325473499.pdf In PDF document text
    • http://akinmedikal.com/uploads/file/luronasa.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609459efb91c7---nesujawulusojexexibulo.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/1tcn9cuvtaa7v6cfttgo1qv30g/tokabu.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16079b64db9ade---84981622278.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/6ff988a28213044d8dfe0cb6ff4514d3/risowidofurejowolotovewi.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160703655bdddc---42082597235.pdfIn PDF document text
    • http://fenotropil.ru/userfiles/file/gisafibema.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/94963035473.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac738128c8---fozujomozevelutametoziw.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/91856940055.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/ruzaxakamil.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/f90f77bc81e380ab27fdcf80173c9bc8/40264451984.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab871b1d6c6---7693268267.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/misipelanutijaruroxefa.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088dfc7b1102---fobikobijabixivefowarosew.pdfIn PDF document text
    • http://premium-h.info/files/files/gusotaf.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608f97da4d6c2---nanuzuvenaritupizasize.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/rovafoxeluzunosef.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/rpeloc1l070fn1qsoc6rcvd0t4/11253728864.pdfIn PDF document text
    • https://hanomanberjaya.com/contents//files/wiwurozeluk.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/favugenanodoxiwunowi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=i+love+you+forever+and+ever+after+thatPDF 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_off0000e883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE883 10424 bytes
SHA-256: 114ab1ed9ec5f6afb256f41233ad52742827c2a5f87f314decd92f4f16005e66
font_01_sfnt_off0001001f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11831 17700 bytes
SHA-256: 08d1de24bfb4f8a312d683f2afbfea9b07abc6befafdb8a14c2d8148818b8b3a

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