Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60c93400e505010…

MALICIOUS

PDF

78.9 KB Created: 2021-08-08 11:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6c4c321c474c163c104cc29038336efb SHA-1: a6dccac88c6df6b2ce444214416d5e46b987d306 SHA-256: b60c93400e505010265222b20c34f8f141c00814fa5000fb25d27440a037fabf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. This suggests the PDF is designed to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://modnyi-buket.ru/uploads/files/2053266556.pdf In PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/dufinevax.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/c3083554e3ae6c77f2152498cb2c4b42/4401322170.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/9drq944fcm1n1dgt5as905ep9f/zimeted.pdfIn PDF document text
    • http://faithleader.org/js/ckfinder/userfiles/files/luvebegepedotolopus.pdfIn PDF document text
    • https://anfauglir.com/images/file/sazejawinoxabozo.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/1bd90bd378379fd4b8805e3a4d29c42f/pewafosekamolaxolopiwe.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/c24ec37b68d6b0a0e4afcc1f34247fb3/vitufegenegagazadukozu.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/bdc66efc55b66fa3f76d154ddd81b211/gajakelasamojiwiredif.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/28953933461.pdfIn PDF document text
    • https://fotokeramika.bg/userfiles/file/lanesosulenusazutimawi.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160d743f3d0081---15246973266.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/43944037651.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/phoabto0gmn5hri9dn67df8qd6/tegogukakiweralonudu.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16085952b253d6---xepamorajirin.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/74744321518.pdfIn PDF document text
    • http://jar-ted.pl/file/wizirolawuruxepudofisaj.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/26961826733.pdfIn PDF document text
    • http://evola.it/userfiles/files/jebezap.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/028f894f191b10f2854913d97de05437/91676198096.pdfIn PDF document text
    • http://htwy.com/upload/file/71023165253.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/58418237572.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/de296c8dd8fff0b1c2b9ca14585f92ea/webopenofokavikafa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=movimiento+circular+uniformemente+acelerado+ejercicios+resueltos+pdf+1+bachilleratoPDF 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_off0000ceb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB5 11364 bytes
SHA-256: fa6f5b22af5a36f4a259f340a72d0670f57d32eba3ddbef4cd385a197c63d328
font_01_sfnt_off0000e918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE918 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001012a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012A 16980 bytes
SHA-256: 71940cd808ec1a779a073e7832aef490b68781762c553128dad026e8ab80fdc2

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