Malicious PDF — malware analysis report

Static analysis result for SHA-256 118635d13eadbb07…

MALICIOUS

PDF

92.3 KB Created: 2021-07-02 22:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c7d5403ad6987be6b873a5a77977cbc5 SHA-1: 88289f5b0bd9f683e641c9b95eeffd4de2a0167c SHA-256: 118635d13eadbb0730a505ef06c6fff70587c432614b9a6e95ee197072112ffe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://cructi.ru/uplcv?utm_term=music+and+film+quiz+questions+and+answers PDF link annotation
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079491b4d3a7---zejisoba.pdfIn PDF document text
    • https://thietbidienmanhcuong.com/upload/files/wamojaluravemopizafuvawov.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/3304842912.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/65871546617.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/27576479157.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a211a3676e2---kozilafaripebokapowosu.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16083e469e81f5---gugupisakoso.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/defopujunukifigagu.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/7ajse6v4ua0bv4hul8jrn1du01/75057715564.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a224a5d4bc---faroxiwaneso.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/7eddc914e3b6668167bb8400f877a463/saradiresuxobapifozo.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3cc896f43---soporidejulavijegufakewal.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/afc588e662d1d6d71ea6badaa4d9416e/guvitizadipiwazakiz.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/ee12ec4a301c33eabd3a6153a51dce3c/50900559945.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/1be4d9d6fd67a917ee1715a62564575e/34851289228.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ca1626e4c---3657982898.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/53272962653.pdfIn PDF document text
    • http://geasit.it/userfiles/files/pazomene.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b198ce3a91c---fedagudadubumenaj.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160748e185d0d4---90518656355.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0808e424f467fa03655cb776f4baa52a/pabomenexodanili.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/no30l3rtnv1tj4hbj5dhrugk66/41938689706.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_off0001067a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067A 17036 bytes
SHA-256: 0f65117e306ca6fb3558b1e9584ce263260055d4fcd621c9612629ce73743bb7
font_01_sfnt_off00013278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13278 11024 bytes
SHA-256: 1db404402881fe90b4e3d3184d1f12414cf007008e92c53a663ebc755ec0cd12
font_02_sfnt_off00014bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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