Malicious PDF — malware analysis report

Static analysis result for SHA-256 3059411eef5317eb…

MALICIOUS

PDF

81.7 KB Created: 2021-09-08 03:59:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 30c4ecf6c24f021bfdfa3ffe384563fc SHA-1: 03157de5c9e3a35eb2a438ed6f4d74a9ac796acb SHA-256: 3059411eef5317eb24e3aa7cb84490b47ce66c20316e26264ed257ffa383295a
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 a phishing trojan. It contains numerous external URIs and links to compromised websites, suggesting a phishing or malware distribution scheme. The presence of multiple links on disposable hosting and compromised CMS uploads indicates a tactic to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://oniceh.ru/uplcv?utm_term=educational+leadership+and+management+book+in+urdu+pdf PDF link annotation
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/43a83514a847ae0b5311047b91d4dfac/xebebafodi.pdfIn PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/ribexejodozixepo.pdfIn PDF document text
    • http://onellenorzes.com/uploads/files/bifatonodatanirosijawo.pdfIn PDF document text
    • http://klwas.org/userfiles/images/file/83301925132.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/b1c06921aaaed5b899d24fbb05fbc039/21556650667.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efd4e666b7f---9120064245.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cc68cdba8e2---49759921892.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/3abd1893e867f0cf4c81c69058237d8c/34157937615.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16085264672a0a---55135634743.pdfIn PDF document text
    • http://kraemer-duennebacke.de/files/file/11238189393.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/d22dbf04adde8e78a46079690765d060/dexavufelibola.pdfIn PDF document text
    • https://maturana.cl/upload/file/24505172130.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/12fcd1644d5abd378568682ee235008a/rugusiwafure.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/c671be3d6adca4ed264e94444e3204cd/lawawukosivukixu.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/f2uo3r5jatngtu97929nk27417/91939302665.pdfIn PDF document text
    • http://iworking.vn/uploads/files/fumafenoxo.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/96635275741.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949d5a79911---bedufawitufinasomapek.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/cltfo8ttd2huh2eic0m3798c64/98770809077.pdfIn PDF document text
    • http://miskolciharsona.hu/pictures/file/jolugofubez.pdfIn PDF document text
    • http://firstcuwire.com/file_media/file_image/file/57166359279.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/fepojizejaputadex.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/m11e098i954nalqe0tepoe2ica/vepavamaxakevenedova.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/pofotiradazo.pdfIn PDF document text
    • http://worldtile.net/jangheung/userfiles/file/nazev.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_off0000d78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78F 11384 bytes
SHA-256: b518c271882cdde45a53494610e1d71e585bb99d18d10f4c1745227bfac8ce7a
font_01_sfnt_off0000f1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BA 17688 bytes
SHA-256: d691ce3aecd223ed509b77035d118b40368b9821855522db84cc128e56df3b7d
font_02_sfnt_off00012000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12000 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1