Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e242b0dc768e9b…

MALICIOUS

PDF

84.9 KB Created: 2021-06-26 05:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b86f6dabeadfb3908608879d5fe7dbcd SHA-1: 4e49aedfb5f161d3ed427a20e454399c02eac3ea SHA-256: 94e242b0dc768e9b00eeef3e9d21aba69a397c31101906363adc9710ab76926c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites, many hosted on WordPress upload directories, suggesting a link farm designed to redirect users. The presence of these links points to a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160af840b0d009---jujofinosaruba.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3d6cf4813e---puboguguvikavuzus.pdf
    • http://wchs65.org/clients/b/bb/bb65574a37642f7fe3135935df861e67/File/66397518544.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be7682087a5---boxelanotexelifu.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16087ddc30c0fd---69202313494.pdf
    • http://esejsc.com/upload/files/9341261262.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/u18fhh0j8co9184upjqbfe9mhe/dixenaxugubufol.pdf
    • https://cottonweb.net/userfiles/file/10838360699.pdf
    • http://flambotour.it/themes/userfiles//files/63562853955.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609670883e1fd---bogosedupozojofesud.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/63ed304d6f06ae97a121b8a72d9aef29/jikatofi.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/d4e54277dcbd87d874061e73c02ee9fd/wunelubadefezisuwug.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/4daaf680cf885c4fa3a8a8dd6a8e4a37/83364034511.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/a92c648dfbd1704bcbeabeba4ae15632/jilunovupesaxulusuxola.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/471b5a6009649dcce50254cfa1443664/bazekedi.pdf
    • https://guruamardaspublicschool.com/userfiles/files/xerusujulonoforodavikika.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072aedb7c0df---73734968236.pdf
    • http://telekommarketing.com/firme_data/files/41604014130.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/ad10eb5ed3e5121b94fd28ae72aa925f/81658209016.pdf
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/f1652cd083a53dd72df10cfaf503e1bb/41300257922.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df6e0890fe---46260190928.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160722d8349e4c---48921499549.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/khgfsm2ml85fu9estr4g48a4g5/59491346517.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/4f55e766df39173c8302fef86cae9735/96515063053.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a49bb41bc2c---xulapida.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=test+for+functional+groups+in+organic+compounds+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb06.bin
7fa2b2e283b3736e2c23aaf402935426ca5b03de0d2a262a359e8605cf2399a1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB06 11024 bytes
font_01_sfnt_off00010473.bin
12b5b54de4455219ddcc97431c5678d954b84bc0aa2e5106e1bd196df2bd414c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10473 16132 bytes
font_02_sfnt_off00012de4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE4 16792 bytes