Malicious PDF — malware analysis report

Static analysis result for SHA-256 5063300329522713…

MALICIOUS

PDF

84.5 KB Created: 2021-09-15 13:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3b708b5df5b7eb8492674f9945af6dd4 SHA-1: 2be97ee9f74fc138e90d3c45596c27d2243005a1 SHA-256: 5063300329522713957ec56442f8dce48d0d128ef56c55be2a5f3e5c107f75f3
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://smidgel.ru/uplcv?utm_term=samsung+s10+plus+vs+iphone+11 PDF link annotation
    • http://topp.pl/_topp/file/sekosabef.pdfIn PDF document text
    • http://spain-ex.com/images/blog/file/87223576724.pdfIn PDF document text
    • https://mobilpetrol.olajpark.hu/files/files/97268510457.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/fejufaxigadepeweteboviko.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/kewalom.pdfIn PDF document text
    • http://ombs.ru/uploads/files/nowovikadanolaxabota.pdfIn PDF document text
    • http://lejonhund.com/upload/65484132199.pdfIn PDF document text
    • http://355353.ru/userfiles/file/24927757929.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/fudilemimolabafuxas.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/4ac37376fbc50b5b1ff60ead347b2579/68197300050.pdfIn PDF document text
    • https://www.twibiotech.com/plugin/ce1/ckfinder/userfiles/files/89646775802.pdfIn PDF document text
    • http://eros-arena.de/eros/userfiles/file/80015726028.pdfIn PDF document text
    • http://mamaskitchenorder.com/uploads/files/71750950468.pdfIn PDF document text
    • https://indiansabroad.uk/userfiles/file/zopirepejagew.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16138814ed5786---60928035084.pdfIn PDF document text
    • https://kontiko.com/ktkweb3/images/upload/files/78355484586.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141596e9be31---15304912779.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/botuwegofoxaroluvupigimob.pdfIn PDF document text
    • https://accounting789.com/ThImg/file/82472010744.pdfIn PDF document text
    • http://flirtproducties.nl/ckfinder/userfiles/files/nubufibokuvasabigoxezik.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140f3d46c324---72577729395.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614167b35d614---4939003221.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb4454c0c0---linavebuz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135c37d3861a---30888442105.pdfIn PDF document text
    • https://ruxthai.com/ckfinder/userfiles/files/laguvaje.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/73938741877.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_off0000e008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE008 10916 bytes
SHA-256: b8e386e925b5fa1c029546181f4c6ae2c0078aca6cc9e9a172feb6397a45fee9
font_01_sfnt_off0000f91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91B 19764 bytes
SHA-256: 519f157cf8fa5a4a5fa7def2f60f052e5ff8e3b43b3f1dfa0cb87a3551e4a26f
font_02_sfnt_off00012bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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