Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e25272ad1bfd35…

MALICIOUS

PDF

90.0 KB Created: 2021-07-29 22:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8b6415d6b27b2c51b4fd66e269ed8775 SHA-1: 726f56f1f2b5a826a33a76e92d1b2f7366d0bc77 SHA-256: d3e25272ad1bfd3558e50009918a3b7ee13f0f4b1b8c7811d8acc1fbeb52a88c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous external URLs embedded within the document, many pointing to compromised WordPress sites or disposable hosting, suggest a phishing or malware distribution campaign. The file's structure and embedded content indicate it is likely used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://allytemp.ru/uplcv?utm_term=reflexiones+para+un+hijo+rebelde PDF link annotation
    • https://aspaeng.com/files/image/files/debawiwof.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/bufoxijopokawuvekufosur.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609269e3a87f5---43373085071.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/wukupobugezeweju.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a328785f56---64464435307.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160719fd58d0ce---gopivazenadazavebove.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/8ca927fb0adcf4300d231b630d2ace5f/delobuseredizejagefumo.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/065af7f47b017bbf79087d8b22e48a74/77351286404.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160fdac637a42b---51143400184.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/sexaserinavoluzixun.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160984394ca5b6---nefapajuvuwesexit.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/85288148005.pdfIn PDF document text
    • http://sgpeo.pl/users//file/97349584488.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a847b787b27---17449154630.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/xesugapukolagu.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/bokobojudakasisikuguk.pdfIn PDF document text
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/55386149500.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/12857134260.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-7/20210507100553448830.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087b2b6e6047---77792734002.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/be6940dd29914749d38e1261e89a37ae/97945267759.pdfIn PDF document text
    • https://agatanorek.com/files/file/51133234065.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d67005c6f---ruramumena.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/29cb511db145d3b16c836909bd21188f/dusituxalozafeg.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/t803d0lqus6mkidq8as5ma1a11/12260739421.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_off0000f8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E9 11012 bytes
SHA-256: d7a7ced73600ad648433cd70cd1bb3a113da0a606e981d65ac6aad063ac0fdda
font_01_sfnt_off0001122c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122C 18232 bytes
SHA-256: c1adcd414e1eae6819b66278e19db3422b99a7fe4ef0e3ce0b0e1351bacfec31
font_02_sfnt_off0001408b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1408B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1