Malicious PDF — malware analysis report

Static analysis result for SHA-256 5967c483a1534a78…

MALICIOUS

PDF

74.8 KB Created: 2021-09-04 07:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 4f2cf030705711455c9b69a174b918d3 SHA-1: f6b9d5cba229ee42a6f5db92187b490b1fb07bd9 SHA-256: 5967c483a1534a78041b74dc63bee6d20335c9b440a1b44e886dcb7e60108abc
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting it's designed to redirect users to malicious content. The presence of multiple external URIs and link farms indicates an attempt to lure users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160ade85fcfea3---jopaj.pdf In PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/16127793229998---watomepujuvuruzer.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/purasipovisixitamoganifa.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/58035706698.pdfIn PDF document text
    • http://farashimirooz.com/files/15963712904.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/999820036410189afa8cfc3a681344f1/38796141646.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/tutasudonikafidik.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/nikojotisabolax.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/satakirozupunejonasibu.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/vafezaditiguzarozemi.pdfIn PDF document text
    • https://shibbirs.com/media/files/69147405641.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/vajofekefejusawa.pdfIn PDF document text
    • https://pernambucoimortal.com/imagens/files/mavanipogelovovu.pdfIn PDF document text
    • https://ak-oroslavje.hr/files/1434776918.pdfIn PDF document text
    • https://funbugs.ie/userfiles/file/40315879632.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/31061285917.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/fojixawowikositid.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/nirotexuwitos.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/8871946093.pdfIn PDF document text
    • http://imaginove.eu/data/Files/somonubositawatagawari.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe9b426d45---29142824715.pdfIn PDF document text
    • https://conrays.ru/f/data/keres.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/4cf1274d8c311d611fa30497c430608b/58712459858.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/93255405761.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/b0aaf4e4d54563e2be4e45b47c413843/15074836899.pdfIn PDF document text
    • http://stavbyhes.cz/ckfinder/userfiles/files/sakeraneti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=novelas+romanticas+harlequin+gratis+pdfPDF 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_off0000c0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F7 16392 bytes
SHA-256: 86f23807b515fed4d4dda45c54b53d3e12084655c364299c625af7c3d7a64f4c
font_01_sfnt_off0000eb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB06 11356 bytes
SHA-256: b35fcf37c8eb16280738e05e1d3b8b8f10ee1255492869485bd3b4a311030892
font_02_sfnt_off00010517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10517 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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