Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cfa417e663c7a06…

MALICIOUS

PDF

74.2 KB Created: 2021-06-27 07:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: aead74fb86b3816e9f8a59b95cf37e33 SHA-1: c4249603d18eac39d62e49424eb9b1fe37a62ae9 SHA-256: 1cfa417e663c7a06271502062a7a6f29e099b422a20fb8fc0c3b0d2705c473ab
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://philabc.ru/uplcv?utm_term=it%27s+been+a+too+long+time+with+no+peace+of+mind+lyrics PDF link annotation
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/3urkg9l7fb0q5cpficg5uqogro/fataxutinegojabokix.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/67465900856.pdfIn PDF document text
    • http://sns.hu/_user/file/fabogavifugalito.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/gl9uk5bntv1om3g04d0s8vktmh/kevatinibabewukilogedot.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160711bf1bb9ee---bepewokofawuko.pdfIn PDF document text
    • http://fitsiluet.cz/data/file/junamakatavipa.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf71181f30---wejevojabumetuvoroxapovus.pdfIn PDF document text
    • http://lyjclinic.com/ckupload/files/44214486056.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c547ac53d3---nabadilegopatebigewegu.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ffcfb24b3---fupejedotarum.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094add798951---12533868302.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/84408443450.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/4e5954674a0a9e595e4e19b96bb97d63/12766482626.pdfIn PDF document text
    • http://boschvietnam.vn/files/usersfiles/files/wujozavafameve.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/84202778517.pdfIn PDF document text
    • http://hykylalumni.org/userfiles/27478819084.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16076ee02b4446---98472465255.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/fonudebovaxun.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/77623105156.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/75966566086.pdfIn PDF document text
    • http://broorybulldogs.com/clients/33993/File/pijitiradabilo.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_off0000bdf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDF6 16388 bytes
SHA-256: 6d460168f1f11b1e361eea15890af0c73933186d90c20bd77a9bf59864d0d8a5
font_01_sfnt_off0000e896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE896 11392 bytes
SHA-256: 538d752925b72a35b50ec203c6f1333f51cfa4c4f961d2fb5fdeeda1501175b3
font_02_sfnt_off000102f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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