Malicious PDF — malware analysis report

Static analysis result for SHA-256 3284da56b90846d3…

MALICIOUS

PDF

123.2 KB Created: 2021-07-02 05:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3c397b37c3a28c3f66107ed91f428dd0 SHA-1: 74941ed8df8c2da0681e3df18158ae7372624f1e SHA-256: 3284da56b90846d3ff29f995d34d5f7961f87616c64d689a01812383359572a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress installations and disposable hosting domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

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://studiolorenzino.eu/userfiles/files/fiwowaratutegunegozo.pdf In PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2dc9baf64---puloma.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4394a2eb52---sibobetiva.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/79db2dolbr795nld83kl6g71ih/26689678077.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/gukivupidozifeto.pdfIn PDF document text
    • https://irantruck.ir/data/file/41548710693.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/jafamope.pdfIn PDF document text
    • https://allianztc.ro/files/file/25749870862.pdfIn PDF document text
    • https://anfauglir.com/images/file/jixaboliro.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/kh7k42t3c90dsvlrfov7po4bjq/829271552.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/aa97akeelo9skn4hc1abtpebhl/99519498793.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae9c8d70df---jibilijufutisegamuxebox.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160af93e0a170b---75986998977.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743da716679---lixatawumebuvu.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/7522bb33c56cff22997dcb588c884d05/64429069615.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/2nei2ec7irdv6stle64f6enner/10628435004.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210503141337_1999841586.pdfIn PDF document text
    • https://arabacioyunlar.com/calisma2/files/uploads/xasanizizedoja.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092d31f1d6ca---46199890260.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160822782695a8---nuvezi.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/vegoxana.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608eef7fc5f49---53282625567.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/b8ef7fcf5e6fa0344cbf944a6cfe643e/tewopadogimoboxo.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/1276391546.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1724a9ded7---5923821651.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=speaking+in+tongues+meaningPDF 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_off00017bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BC2 10716 bytes
SHA-256: 837c15fd920facb398b75da6a4dfc1834286eb15d054a7a8979a7071d16cde15
font_01_sfnt_off00019461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19461 19720 bytes
SHA-256: afbb5633b551338e2f481dde2370f7e675ce5c1b5c9d92d91caffbc82998c958
font_02_sfnt_off0001c722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C722 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1