Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c5794fb84f233af…

MALICIOUS

PDF

90.6 KB Created: 2021-06-28 16:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fbd53b27af42fe44f2d4c18c58489623 SHA-1: 3ebfe8ed9991a2a2c1c360c4f553b2f7d19c7392 SHA-256: 3c5794fb84f233af1bfffb7d7d21cf0214564c17cbdbc7f4c67b9f824fd55727
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users. The primary attack pattern involves exploiting PDF vulnerabilities to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://cructi.ru/uplcv?utm_term=3+days+of+darkness+may+2021
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609990344c833---71663384757.pdf
    • http://dzbnf.com/upload/file///8609881341.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160752278b2a28---37059006840.pdf
    • http://cocoal.com/uploads/file/zesizazozikedufe.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607cde8e60e97---votiniguvupegujezefise.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ba7d3ecd5---3991876982.pdf
    • https://eatorhours.org/e-bussiness/fckimages/file/56229202406.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45b91ba883---81136016570.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6b82c95f7---vineloxuf.pdf
    • http://hgbs.de/userfiles/file/99633320427.pdf
    • http://womenshealthcarenp.com/clients/2/29/29a32d4da59f0b4eaa4573e1354aeabc/File/35584449300.pdf
    • https://geneolock.com/locktactyuma/userfiles/file/49961734982.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e78df328e9---detozuliwatataxofupolesi.pdf
    • http://asesorgubernamental.com/images/file/19103612202.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/50apmlv2kqbtoiff461em79jmn/vevenobarulazik.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073fb9acc379---lituvizikowe.pdf
    • https://allianztc.ro/files/file/14988175066.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a80a765a6cb---25928588855.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/f722897a7e972c4c314e598074ad79a2/rolavizezasaneked.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/49e1033c39f3e8a72a9ab8de36a1ea31/80707836444.pdf
    • http://hccc252.ca/clients/e/e4/e484b38507f190a955b66748903449e1/File/fejojo.pdf
    • https://actor-conseil.com/files/file/robexasitefure.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/0cc04e23f9638f6196d3967202b995db/tigixukum.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a229f84136d---tavulimutorel.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af833e8dca0---pekifibitusasaxewif.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a281dd634d---xosuzuz.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_off0000f9e5.bin
3521dbe15c13fe32c673b1faa97e66cdbb6c03e9b328911c73ecfbcd3bd3ba29		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E5 18412 bytes
font_01_sfnt_off00012a67.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A67 16792 bytes
font_02_sfnt_off0001427e.bin
5947dd0b54709c417c67c5b406ad1091bd58cee0de86b149c6554366a506ea9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1427E 10852 bytes

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