Malicious PDF — malware analysis report

Static analysis result for SHA-256 febdd0c2c47abcc6…

MALICIOUS

PDF

85.9 KB Created: 2021-09-03 19:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 89b82f72aec46a978daaa2db659c003a SHA-1: 522a877ef6d85e3c25579dfe4b35fa8db7abac0f SHA-256: febdd0c2c47abcc68c1b68e93e9a50e8ead54269a3d9ab5ec5b1eb6f96175df4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms, suggesting a phishing or malware distribution lure. The heuristic firings indicate a link farm strategy, with URLs like 'https://allytemp.ru/uplcv?utm_term=download+novel+sword+art+online+bahasa+indonesia+pdf' attempting to disguise the malicious intent. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://allytemp.ru/uplcv?utm_term=download+novel+sword+art+online+bahasa+indonesia+pdf PDF link annotation
    • http://rallyteamwalraven.nl/file/22433144688.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/h07cgo2ia9n07os9sboaqjkdf5/kaxovul.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/448defa69dbe00249b7268ce94b88d1e/goviviremurukeruwaxo.pdfIn PDF document text
    • http://perila-vrn.ru/userfiles/file/50931078471.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/runoripifusikonekezulaxez.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/3739853886.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/ba553d0d394c2182ebe24d06c9f2c240/kejunezokazoguma.pdfIn PDF document text
    • https://airflow-skateboards.com/userfiles/files/rilolukomij.pdfIn PDF document text
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/83152992989.pdfIn PDF document text
    • http://gintaras.cz/userfiles/file/45654453979.pdfIn PDF document text
    • http://graficaeformazione.it/userfiles/file/36337190311.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/linukegebejezadij.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/parodavotoxovekivaza.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/di4g3chh8iqbr6n8srqt4d4m05/lakimogurofavir.pdfIn PDF document text
    • http://mileschapelcme.org/clients/9/9b/9b85db73e8c1d5ae3bc18b6db4f26039/File/losozoregobowe.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/sn952a7ou5l3b41lfaulg6ga10/pegakutikaj.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/rapavuvusaganesepodatajib.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/zaxufapimum.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077cce9d5455---65828022254.pdfIn PDF document text
    • http://expnavi.com/sites/all/sites/default/files/file/81866656155.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/42537836391.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/letamilebazidefavabaz.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/1b9da1d7389e42bff33a2a17a0c0bd7c/53110830893.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/f7bda4c2eaebfec1a88c7bb5ce0530a6/60293105678.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41D 10888 bytes
SHA-256: 039004011330c091b9acf3408ca3ce2cc969baf793f634872a212fb99b588b75
font_02_sfnt_off00010d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0B 23068 bytes
SHA-256: 1e3ca1d5dcd51cfe20afeb8eb98cd98e7b674ffc9d2b1203e1edc15ffc39ef26