Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd804b8dd50a8409…

MALICIOUS

PDF

95.7 KB Created: 2021-06-29 11:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5053cdfe48cf57e85e1050a3763e6268 SHA-1: 89a522916ecbd968981e8b6972ae7df57640a484 SHA-256: bd804b8dd50a8409ed675906673f1b42862eb23e33bedf7a0a61c84bf6b647dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, indicating a link farm designed for SEO manipulation or traffic redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 https://queure.ru/uplcv?utm_term=mice+and+men+author PDF link annotation
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b6a6a6106---totadijudanerabopuwetixo.pdfIn PDF document text
    • https://tylbm.com/Upload/ckeditor/files/rupamano.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/410ad4ac9ad48a084c70e8c50ec860e7/mifes.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc0da39e5e---rorudemukaviganasijap.pdfIn PDF document text
    • http://yejida.com/userfiles/file/nezudex.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7daf27959b---laliroxajigilap.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/haqkb0ilb5fhukgu0gjsks2oq3/98114300796.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881ec621d29---20270698188.pdfIn PDF document text
    • http://pestcontroluttara.com/ck/upload/files/26608525892.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/1d5eb359dbfaebcd3bebda8db61b4349/55683406014.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/b2f431584d208b265ce4790e6c69c1ef/lumolowag.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/rivowaxaxuwures.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b865b0af9ba---rilidapuw.pdfIn PDF document text
    • http://josephlillianmorrisfamily.com/clients/59960/File/87463378634.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/46280803241.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe27a2e8f9---mipikuwabitarakazitadibip.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/56742493402.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f42409f44d---51604597755.pdfIn PDF document text
    • https://totounited.com/contents//files/wisemogaxowetukopafuboja.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a6292d04c30---pidusegu.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/4bc00543551dc751a6a39300d4c10315/17652553795.pdfIn PDF document text
    • http://elijasprojekts.lvfiles/file/53802026624.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/rawevupotoremebi.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/612a39dcc1bd705890c0e5471477b75a/romidesiwutuvus.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_off00011455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11455 17440 bytes
SHA-256: c307708bc87b1a971d3774640634452e7dfb247118ee2a6aca2731c910051def
font_01_sfnt_off00014207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14207 10512 bytes
SHA-256: 441ae4f2556e2318600f9fe078d627c0432aac723a8ca50b3ae3bb154eef5743
font_02_sfnt_off000159ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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