Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5665024548b162e…

MALICIOUS

PDF

70.2 KB Created: 2021-09-15 16:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d90c1fa059b8cbca1cad1699106ea17b SHA-1: 1f518d8655902c69843b8427b9f75a88f5800a1b SHA-256: f5665024548b162e60f64c6070a935dc8ecf2ed388f3c58cbb1ba48b2796e459
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to compromised CMS upload storage and disposable hosting sites. The embedded URLs and the overall structure suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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 http://re-media.ru/foto/ck/files/84876101380.pdf In PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d30f3d0c7f---pekujejaj.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/lisilapuwurikafa.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/42059665824.pdfIn PDF document text
    • http://xn--franzsischebulldoggen-lec.eu/userfiles/file/nizuposizi.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/37801929575.pdfIn PDF document text
    • http://khojedu.net/userfiles/file/larijeme.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/eeb6fa69e7828b9939f8530da313eb92/zakakorafowegopidigodax.pdfIn PDF document text
    • https://asesoriagade.com/app/webroot/files/files/23346807325.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/80021589124.pdfIn PDF document text
    • http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/wetedemozededijer.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/61537310832.pdfIn PDF document text
    • https://iword.de/userfiles/file/62602377777.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/divodadupagov.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/161419dd7347aa---nuxoxalol.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/vedogudivoda.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161382ed521d09---35438739155.pdfIn PDF document text
    • https://nmcs.ca/userfiles/files/62979134072.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/14591872422.pdfIn PDF document text
    • https://soosekszer.hu/upload/files/nojexanapis.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/gurisivemidufo.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e3504a286b---28473689286.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/25620145903.pdfIn PDF document text
    • http://hiroshima-teishaku.com/userfiles/file/wuxedemafogejul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=manhattan+night+full+movie+onlinePDF 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_off0000b64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB64E 10552 bytes
SHA-256: 1d6cede051ac6efdc1d7a3472238cb8c5bddd90da5199c566984685772b60fde
font_01_sfnt_off0000ce2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2C 14628 bytes
SHA-256: f45c8e7e42e9ccc4967f6e2fcf663d80e302dc5303a181e639f5c045123632d3
font_02_sfnt_off0000f2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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