Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c9aaf4adb08f8c…

MALICIOUS

PDF

80.5 KB Created: 2021-08-24 18:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: df2246d70f69fe2fd9e06cd4cbe4eb0e SHA-1: 45354679f15ce3bab959491ee9621d5f20b47675 SHA-256: e7c9aaf4adb08f8ca0f689ad999d1090e24d8401111397a32ca61d2ef91e9adf
156 Risk Score

Malware Insights

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

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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=prayers+for+your+husband+pdf PDF link annotation
    • http://windsbs.biz/files/file/nojosagukolunetixidasu.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/d1cc8d303c3bc774f7192856e800ddfa/71982093718.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/kolubizofote.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/8bcb0dc1efc7e897ef02ff33027ee6b0/41933608600.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/cd69d8e1180584f57c0bb5686265d60f/raremedekurefenafa.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/295045300dc963550410a1f5995cf755/54178539577.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16220406771369516080.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/sefapududukowivito.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/nigone.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607683c94a3c8---56958665681.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/81m6re2gjup6qgbfe1n68pqklt/setejusivak.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/bc583227192fe7a4444a26830a99bd0c/23243362993.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/766e4e2525afe830a4815a582612cda5/84236527429.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/nugebiwur.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/11df1f48fa533b3c06511ac264bd00c0/xuwep.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/cnq45dki6qm2eo4c0t854cf7kg/789453673.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078a5dc37fe4---zuzokexalosadinolan.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5baa8e675a---larewilajofexotojudomeb.pdfIn PDF document text
    • https://kingyao.com/uploadfiles/files/20210716_154607_2211.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/vuwamuvedazelubejez.pdfIn PDF document text
    • http://yugreat.com/filespath/files/20210812201634.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dc6032835---sevegijetopuwenolafu.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/24324814647.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_off0000d9f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF209 10716 bytes
SHA-256: c8789a5d73bbe190802d0082272a23f30dfbef922443a5c3a64006000700290d
font_02_sfnt_off00010a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A56 16048 bytes
SHA-256: 5e8505408f807c4d6dc829c21615a505e21b9d8ad91a5242ea3c0b105e555f64