Malicious PDF — malware analysis report

Static analysis result for SHA-256 448ba3fc0e106d9e…

MALICIOUS

PDF

82.1 KB Created: 2021-09-06 04:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d3980147b3bbe2a5c11c146bd6abff2c SHA-1: ef6b1d01b7608847ddd3d80af592e7fa631f0d2b SHA-256: 448ba3fc0e106d9ea132203edef990f32511b35214270061b61e0d0e4061203b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics indicate that this document is designed to redirect users to malicious content, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://medvor.ru/uplcv?utm_term=icici+bank+new+neft+form+pdf+format+download PDF link annotation
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/6b9849831283cc9e6081d7d5e12441c4/79690984949.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160dbe947c6f9a---81864872374.pdfIn PDF document text
    • https://ostrichpharmaceuticals.com/userfiles/file/disedo.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/3f925e0da34c91d4574a9417e05dd071/gakelelujijonirojivapov.pdfIn PDF document text
    • https://castel.ro/userfiles/file/49180174706.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/bbf8c70b4cae4f382ef4e3ecdd23f385/zopuzu.pdfIn PDF document text
    • http://museodegliarazzimarsala.com/userfiles/files/tametonagizir.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/33769093639.pdfIn PDF document text
    • https://irepairplus.nl/app/webroot/files/userfiles/files/22587353876.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a99a0965084---89279015234.pdfIn PDF document text
    • http://amdind.com/userfiles/file/53522878605.pdfIn PDF document text
    • https://fallsplat.se/file/56575985008.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075eb8b5b131---10163673293.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/13704999272.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/73cfcaa2aced8e63bd16b571171ed8ed/969074840.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/fdauegfp60gdqo897q8npmr754/53952740046.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/2f3j7amqtlach9or3ah69371n0/xijonakamipatovuloziwen.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/lubipuwewiv.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/vazukuf.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/40974485002.pdfIn PDF document text
    • https://eastmangroupllc.net/ckfinder/userfiles/files/bovobuvupuziw.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/58591657319.pdfIn PDF document text
    • http://studiogiovannone.com/userfiles/files/bagumaruliziwu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAB 16960 bytes
SHA-256: 73ab184237ce95731f1304c95b6d086f54e9488c909adb19a2c68abf59904a45
font_01_sfnt_off00010943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10943 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001215a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215A 10880 bytes
SHA-256: 49211c92c800cddf0cdd7d5c6d4606fda1ca91bf18dc3b11181cbab868570083

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