Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca10e83d31b96c61…

MALICIOUS

PDF

95.4 KB Created: 2021-06-28 01:31:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c369170bd794769fb872c2866e366a0a SHA-1: f8a28ffa7db18face7cd4519b7f436588bca4c2c SHA-256: ca10e83d31b96c61884a6046311cc759dc9fdfa82a5057c5e8365a4a872e75da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload directories and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://catamma.ru/uplcv?utm_term=php+artisan+migrate+could+not+find+driver+windows PDF link annotation
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/6jl5svuocrrur31nesg8b274l7/zibitixotirajeposav.pdfIn PDF document text
    • https://dm288.rs/slicice/file/lalujugeloji.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160adaf00e3e2e---72227276011.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609209dd513fe---kipok.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076fe2517e7f---71316556829.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/64nac7belf6pnrk1m2i7jo7bk5/xugitabobuzunix.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/32423856231.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/66656542082.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c405890dc01---24814238175.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/42098765843.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c2be2c7292e---nawenawobovebekud.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/aurji0060c1tsevnoj45nivpn5/govevizulegisejomujo.pdfIn PDF document text
    • http://theleadershipworks.com/PO2/UPFILE/userfiles/files/3343261101.pdfIn PDF document text
    • http://incucinaconalberta.com/userfiles/files/duxudinaxazozoliva.pdfIn PDF document text
    • https://nenanhduong.vn/Upload/files/detadaguve.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210428035447168.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/vn0osseoqugcsa4v2irsmqs7nm/80106824135.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/429018eb9d1783eeb6c15325feee41fe/86439022475.pdfIn PDF document text
    • http://elitvorota.ru/f/file/94499970879.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a37aa0cefef---73638330303.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/df8ea50bdd54e0437c48b45cecf60801/fozegas.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/tuzok.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF395 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA6 16552 bytes
SHA-256: a3d51e1f3cbb4e8920623e8810d69366c0e7704be6f061d68490769752093d3e
font_02_sfnt_off0001224d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1224D 11320 bytes
SHA-256: 63a7ec7c19b63f534f30897fece4a8a659ae3c7f8e4e0d32c3d81c9660054691
font_03_sfnt_off00013c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C97 19632 bytes
SHA-256: f1c190a3e6db72f3a398bba6eed3d906396244b56e1cdd43e0a6869b841aed9a

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