Malicious PDF — malware analysis report

Static analysis result for SHA-256 53264b9759449263…

MALICIOUS

PDF

72.4 KB Created: 2021-09-05 14:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: cffe5d450d45d1cf9f752c5ee173fd8e SHA-1: 0f29cc66818787c095f1ac66beaf2eb5667ebbac SHA-256: 53264b97594492632d9495afeaf7fa5f779202012dc8ca76ceb22684e15b758e
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the nature of the links indicate an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://cructi.ru/uplcv?utm_term=windows+program+to+write+on+pdf PDF link annotation
    • http://samnakthodrahassob.com/userfiles/file/98263286000.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9500c28db---labukulavize.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/47259801825.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16077e34743942---50252306199.pdfIn PDF document text
    • http://www.iciparis.ru/ckfinder/userfiles/files/38424820073.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/75870736658.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/bevez.pdfIn PDF document text
    • http://apsons.eu/files/file/wiwuw.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/afce92756e11b4dbb6ebb79a3aed0d14/747867837.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/46953929577.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/5680753794.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d155b4103---72535969793.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/gomujomitajufil.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/28303596369.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/4a1b96c338ada386ead5f26ef4d6b02d/53999467677.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16077d2546f2f3---joralizujumasafigogo.pdfIn PDF document text
    • http://trendybiz.in/usersfiles/file/filixapesajugorotozam.pdfIn PDF document text
    • http://teakdeck.pl/files/file/xotujukosugekutiji.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/54947667508.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/77352835635.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///3217201632.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/zegevegafajetulilafasof.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/dululisasoreladomodom.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_off0000ba57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA57 10872 bytes
SHA-256: ab113d94cea9802ddc8ba1ad650ab923a9b4715a246fd9f2e63adb8e7d978073
font_01_sfnt_off0000d34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34E 16044 bytes
SHA-256: b31e9a4445f1e80d5df97c02794c54142366a08ee8095473fc83912b92eeba14
font_02_sfnt_off0000fc7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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