Malicious PDF — malware analysis report

Static analysis result for SHA-256 48bb65287f5f02d7…

MALICIOUS

PDF

77.1 KB Created: 2021-09-02 18:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1bfc12ef4be9b6c00f0d8278db17e76a SHA-1: abc2a85f7b68d49a4c6b1203868a694ba49526df SHA-256: 48bb65287f5f02d7f5547d6a221c1044934a0a9f079f4f038739f032c4237e7c
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://crysiq.ru/uplcv?utm_term=rowenta+steamer+owners+manual PDF link annotation
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fa43e775d---96420749772.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee56301daf---41892809898.pdfIn PDF document text
    • https://appfacile.it/file/kofoderolek.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16121156d57881---paripakigufikebuze.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161271ae45a366---topogelarixigibel.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/tibadigatigidufor.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/laporiked.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a59dc58107---ketakowufiboromofedex.pdfIn PDF document text
    • http://gimhaejazz.com/fckeditor/userfiles/image/kaxegora.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/bekarixiletaxemi.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/0dbmp7vgt9me8g0ghcfu855a0f/piwenaxuk.pdfIn PDF document text
    • http://sam-global.info/files/file/66232960773.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/618eedebfac130caa279872e33600f55/sesezixadavamajeva.pdfIn PDF document text
    • http://plastikacz.cz/soubory/files/wanujosojusuxetilijuri.pdfIn PDF document text
    • http://flairpens.ru/uploads/files/19549858558.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097fdd0d6d9a---97690429274.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4d7a4386c---gifoxagariteva.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/sopajutafivanonuzowana.pdfIn PDF document text
    • http://hotararicedo.ro/files/files/salugoge.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/e6212f81836e567f1f2346fb0b6e75b8/mawutezejubavavujujozuzo.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/2df64dda1079009add9a7ef53a8e5ec7/gotokunokabolugatilu.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/sozenenegax.pdfIn PDF document text
    • http://apisicul.com/userfiles/files/patesufanigotizizediminuz.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_off0000cc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE484 10408 bytes
SHA-256: 88a20f58273f178e8c46fc57a3b4510728ba6b7ac621209d8caecfa503909b11
font_02_sfnt_off0000fc2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2D 16556 bytes
SHA-256: 5fc972ae5b7c7b4d8380a5a5cfbcbcd2c742e50f0f0f980d0ad9e70f0e28277e

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