Malicious PDF — malware analysis report

Static analysis result for SHA-256 47879054042410fb…

MALICIOUS

PDF

82.8 KB Created: 2021-07-02 11:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: cfe104eb2e5177d59e9b2aa766dc12d9 SHA-1: 68b7cfc8cbea84fd3a105d4a7a110fd25f6872cb SHA-256: 47879054042410fbc62619ece83893e68ec97802eb3ec10cab2c6c28cbbb31ea
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to potentially malicious content. The presence of external URIs and link farm heuristics strongly indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://www.cenlajobinator.com/siteuploads/editorimg/file/xabelanofufazazujikidel.pdf In PDF document text
    • https://ceccarbotosani.ro/userfiles/file/wogufegezodajagodi.pdfIn PDF document text
    • http://woodsfamilypride.org/clients/2/2c/2c83419adcf4927d74d3defe18342386/File/75779423412.pdfIn PDF document text
    • http://mujuerp.com/uploads/ckeditor/files/20210529085234.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/jabajikavakajulonavovurej.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/ooskcbdli0adnupr59mqs1q4qq/dodoxuzulam.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/ribelizisilojalinil.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/tisewiredunabujede.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/limakekudamezewufen.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/e7nurn3eg8iiqpt653stv3hjb5/detivor.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/b7ce16fd1c3eb1afea1065c523bd4d8f/sokawuvuruvo.pdfIn PDF document text
    • https://blindnow.com/userfiles/file/88696999580.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/qtnr3ldrvrsp1q38bbo7ev80n5/wanifu.pdfIn PDF document text
    • http://zhuoer.ltd/userfiles/file/65314297456.pdfIn PDF document text
    • http://amandamaitland.com/images/file/24029050960.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/maziz.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/55050145909.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9afe56cfab---93659068863.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/62054609999.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/dufukogesitoriledebinuv.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5ba2922f4---6709528214.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/4992069a94894fce36243f9b25bf2cfe/48397243001.pdfIn PDF document text
    • https://couvreur-hautdoubs.fr/internet_new/images_et_fichiers//file/furorapazozulalinezunemuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+much+my+catalytic+converter+worthPDF 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_off0000e34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34B 16244 bytes
SHA-256: a5b36216ba8fee15e6e6cb7e1b2bd96e971aa77fa1905a54ebd70ba4443f8e8d
font_01_sfnt_off00010d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001256c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1256C 10684 bytes
SHA-256: 33104929f40181e877a2fe0014c07ae9173fa1c39cd28670721e238a6a9837e7