Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5aced54e9c9694c…

MALICIOUS

PDF

89.0 KB Created: 2021-07-09 14:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c59c15e5f072fe6fde268ca5c1c2ec1f SHA-1: 95156c3a9d2342a5e10aba6758f43a53f962d8ab SHA-256: f5aced54e9c9694c1b665d6ba82326c418dd7d58e762b76d811f7612974c1aa9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://hurtowniagrafit.pl/userfiles/file/bitafefawokurevemi.pdf In PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/2557183629.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/74929530689.pdfIn PDF document text
    • http://asahiru-ban.com/files/files/bazefisukalebo.pdfIn PDF document text
    • https://tepihtrava.rs//files/60511514542.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/davodovimu.pdfIn PDF document text
    • http://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/127d9d58e9e387327365923e0a0f7b74/27663993927.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d7aa1cc61---75273367694.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/nojubu.pdfIn PDF document text
    • http://veterinariacomportamentale.it/userfiles/files/wazepojoruw.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/6ff823199191a0375756d6454c0b409c/digatanesuzewugujodojij.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/p8kgvmm4cas59ld0lrp8752hu2/jupawu.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e3ec3ecdb99a2d3bb6bdd71cac3b42e3/tokudekuzubalutil.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086b5468083e---livekifudijadalenesura.pdfIn PDF document text
    • https://aquamedicasatumare.ro/ckfinder/userfiles/files/24402908383.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/bpr1hcebn13m01rulni8l3fd6c/rosemebu.pdfIn PDF document text
    • https://hmradiatoriai.lt/images/files/pudidolasipuwibuno.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/1611641941.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/l09baod9ea53jof4f162k3kht7/81306054549.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c77d5235381---zufajovodiweketuxiti.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/7k72bimbbgct8pkskr4d1iib5a/kurenimibafakopu.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c86ab992a34---82783449234.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/sa21e593rkh779dob0madk5ean/79194967534.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=what+are+the+types+of+figurative+language+and+their+definitionsPDF 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_off0000f7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E8 11052 bytes
SHA-256: 7095783a855d381ef72744c1ff2095ca9f55235ce125f47ae7b7d5951066d3d7
font_01_sfnt_off0001116c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001297e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1297E 17172 bytes
SHA-256: 2390ede4e27cfeb9f319e9fe2eff558877b928f006c78a3525aa88358fc640cf

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