Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d4b6727fc33c4eb…

MALICIOUS

PDF

85.0 KB Created: 2021-07-01 21:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 676764a5fb1ed6ed20effc3c43993064 SHA-1: 97f3df589e467f5168d0465eb8356e35b10c51c4 SHA-256: 3d4b6727fc33c4eb3f0e76a7ed3c10e2a0d7b8ae4e90e4802c266ed0f146f12b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the link farm and the PDF format itself often leverage embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://bangprice.combangprice.com/beta/cms_image/file/pixalaj.pdf In PDF document text
    • http://abwingssuffolk2.com/uploads/files/solafekim.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160985f2e95492---94589927285.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/fegibevajufidumid.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/74300716963.pdfIn PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/xutiduladeze.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b664305bb56---67068358530.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/tuxadivepejirebadugo.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/telezexosuraxuwid.pdfIn PDF document text
    • http://stasta.com/userfiles/file/23282683683.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c369d1e067d---49857824543.pdfIn PDF document text
    • http://stattus.com/assets/file/29233585294.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/66135341755.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b13eef9f9ec---25580660945.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/83064186772.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/ti11rbroupuhrs7h6osmarm060/zikimexevudiwiriraf.pdfIn PDF document text
    • https://luminex.pl/upload/file/kalagegisusoxit.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba28ac465fa---44976024125.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607292298ff50---seweditidebimabosoburi.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082973e20ef0---vazilerevobuzalajefoxeza.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/15446710599.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/gexarep.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/wenewevemuzukavemajoliv.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942b5d2f74a---koboleban.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/35917505190.pdfIn PDF document text
    • http://amandamaitland.com/images/file/36425592008.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+can+you+earn+free+robuxPDF 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_off0000e987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE987 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10199 17160 bytes
SHA-256: 86a432f29c2cc0dfda36819080bdd713f959467f496a7316febb6e631878b4fa
font_02_sfnt_off00012ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBC 10456 bytes
SHA-256: a72dd8af56bfc6c22372341124c81634e326f5faf4fa34e771f58e03c3b9256a

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