Malicious PDF — malware analysis report

Static analysis result for SHA-256 29b91ba78343cd92…

MALICIOUS

PDF

100.1 KB Created: 2021-07-31 15:30:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ada51de6393f97af7f62906553248235 SHA-1: 25393b196634af6af5fdb0de69cdb89912e16a1b SHA-256: 29b91ba78343cd92af84073d320e251144a2fb82b3c4675d0eceb608202f4da7
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The presence of external URIs and the overall structure suggest an attempt to lure victims to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9669

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.pethouse.es/ckfinder/userfiles/files/39231614806.pdf In PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/69f600812b6ac5f06039595af4330353/fevumalivor.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae97d3bcaeb---22794342669.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/dumaripizeduwageze.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/f45246959b4511fe735dbb3f1dd26b75/82331603166.pdfIn PDF document text
    • https://biovuspharma.net/userfiles/files/komipugu.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/1d8a5c8daf45cf8e4c0b6fa03e1a41fa/jitusonabotujeto.pdfIn PDF document text
    • http://predit.ru/admin/ckfinder/userfiles/files/41606281275.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/1195e3ede7ab31fe6dd6374838468c6a/62895627776.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/db4d41d871b92f60d5ef9feabb6dab97/54360190878.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7bc854aefc---56091577968.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/tofazovuretuvidubema.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/ff7c502e917aacd76ec74dbcf94c83ad/80558719078.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/47j5e9tg9tn6a3svf7k2rfvhgv/mukimowakofejefijatirebu.pdfIn PDF document text
    • https://schmitz.cz/res/file/68548955309.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2df1c9341---83780756690.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/30542909540.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf5d10fc04---nuzavexavijo.pdfIn PDF document text
    • http://tfforming.ru/d/files/rigopotoniliwa.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/42257834620.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/11307105812.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16079f9b54bbac---81059153465.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/65a6cff7dca5a76244a3d73014280bb3/tidasofanup.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/vetumamipa.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f096b2b7c5---30242394081.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/bobonafod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=amazing+spider+man+2+google+docs+mp4PDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB82 10996 bytes
SHA-256: 2f04fd52bfbf69ec6fcf379bdaf6ecc1828087358a2aa66157bddb0cf06a787f
font_01_sfnt_off000114e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E7 2460 bytes
SHA-256: a2ee4c9f14f47e82999fd0044bd02d12d0710d8d12d5971c6b821481ebc8e52e
font_02_sfnt_off00011fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAC 17248 bytes
SHA-256: 85d0ff9854158779ee1b6b890d2e1e395f6d37dc2fcabe0df9e8b959eb37626c
font_03_sfnt_off00014c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C90 18236 bytes
SHA-256: a8272fd56f9ffcf77a2981f2220c49cf2443f629ab305c8b2fec6416f24df047
font_04_sfnt_off00016801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16801 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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