Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2e6bda7d8cab9f…

MALICIOUS

PDF

91.0 KB Created: 2021-07-14 02:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bf37dfe87a8bf32cd84aafcaf78a61cf SHA-1: 34ae8b823c2d2f9389a05ab6c0d0bbd1b8214e72 SHA-256: 9e2e6bda7d8cab9f897a1be8578d6926c6a48dfdd7feca64f01b28c77dfa979e
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised websites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The sample leverages external links, likely to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://archism.ru/uplcv?utm_term=basic+graphs+of+sine+and+cosine+common+core+algebra+2+homework+answers PDF link annotation
    • http://agriturismofattorialucciano.com/ckfinder/userfiles/files/dozovigedifi.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/potazagevux.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/f8daf429db0d3e7e3469287f7a41e0bd/79868060544.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/xejimexenofibozavofed.pdfIn PDF document text
    • http://terralindahigh1981.com/clients/866868/File/xoxuvadefijupiforul.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/lubuminenokidezeduzoz.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/8ufjngaohe7kdtoiige4c8kl19/sazojivi.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/575fa499021a8c8fcd6570f3488a6b71/zasotivezobigaworenejume.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/bewupubifulajejo.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa91d5d561---93576212754.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/48666766602.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a91deca8e5c---95704229261.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7623fb4108---kudolulur.pdfIn PDF document text
    • http://stroi-sistema.ru/img/japewo.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/94340513598.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/f4f3d4f4d619913e63f89b86e45d8eb8/13175599329.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2824265d8a---vafusolodes.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/5bf360f2bb9a8c39102185c71b36a3e1/91877052912.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607327bd44525---48817630962.pdfIn PDF document text
    • http://gibisch.org/files/files/80061246076.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082b9f5f396b---56434769558.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/d0f6045acaf4c674dc42ee1f9025f0b1/82431835682.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/45722516723.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833ffa14aae---96026187500.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_off0000fdc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000115dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DC 11460 bytes
SHA-256: b1bff10782285469ad4ec49edc162bfa16a6988dc1d7ca760f951070231a8781
font_02_sfnt_off0001306d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1306D 16588 bytes
SHA-256: 7a45533cb0dcaaf96cadff039a981202b951105d408f2139ad778023b5952f2b

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