Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eda5cc9d8723eba…

MALICIOUS

PDF

85.1 KB Created: 2021-07-07 10:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 193d48d4fb2c4b072719d398ac741309 SHA-1: dc0ff7ebcb90d4c99436cb5c22c40b3186e4c5ee SHA-256: 7eda5cc9d8723eba2c817886f2f13df67d8714c281d2fb4c2049ab01d7677db9
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of a link farm on compromised infrastructure is a clear indicator of a malicious attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16071c8bf97dfb---manawibowivabekejolanar.pdf In PDF document text
    • https://bloomland.com/sites/bloomland.com/files/zonedidugogaxodu.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdfb2170a0---39082750612.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/16576632890.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/81528280574.pdfIn PDF document text
    • http://english-life.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16071767801b2a---92921846901.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/82205417612.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/h5fejdjckrlkrm77lpok38ffg2/fedakugip.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/wagagebevabidadik.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160acc9360f292---xudojuregefabesibawewir.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/kabamejerawe.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/62b6ccf2613e32839c7cd87c708ed533/2115537792.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/0903bd27cbc2fa1b668862c58aca35e4/rovedikifuvunivususep.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/985bed98658b2e0781f481947a6bdaad/92747414836.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607073b500b41---kodomujerevipu.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/tanusitowuzowud.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/5257208099.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae73b21a79e---zobozefubijejupiv.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/a24c824392252c0f7cb0627cbff4fd1a/mivukikekowud.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/6567495765.pdfIn PDF document text
    • http://ruishikaishi.com/upload/content/files/2021/06/20210612060946.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e50c0f85695---33456238161.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b658d35125e---legufuxenojixafiku.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/gepotegik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=free+d%26d+starter+campaignPDF link annotation
    • 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_off0000e78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78F 19816 bytes
SHA-256: 14d4ce7b5b14228135da847bde1f198cc9bb71e4326d35f1001a2d71705fbe62
font_01_sfnt_off000119d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D9 9428 bytes
SHA-256: 8a35a37c68047b1238e2bffbae3baf31fab8bdc890f7d1920bf7ea5adbddf9b7
font_02_sfnt_off00012e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1