Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea228c334948f16a…

MALICIOUS

PDF

88.3 KB Created: 2021-08-31 05:15:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e2a282c3ec87630c5cefa0243b0b8621 SHA-1: b1d728b1aaa55b10916400fa1c4435727d0c92cc SHA-256: ea228c334948f16a2f85da8c95385f9848ceff02835bbb0568cde0ae34840806
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a phishing or malware distribution campaign. The document body is unreadable, but the presence of external URIs and compromised CMS upload links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://synerhu.ru/uplcv?utm_term=can+dehydration+kill+you PDF link annotation
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/zopojowinoxugutev.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddc868647c7---gasinipumevolarij.pdfIn PDF document text
    • http://aliotoconsulting.com/clients/862286/File/kuzazulajelegawotukusav.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16125a150dc396---nawofef.pdfIn PDF document text
    • https://projekt-lesen.de/userfiles/file/paloke.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2a6992317---nomovekifomobeni.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160861596c005a---pedasovarevariwubukalexev.pdfIn PDF document text
    • https://netlandschool.cl/files/buxedinuvedoribejuma.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/83717118643.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/e021e0a3bedc2a5390c1ad7d0f6e20e7/xudizijaxuzijit.pdfIn PDF document text
    • https://cooperspick.com/files/24189245375.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/pjvh978apgpf01tevrbfqc7rqi/nemexanirexixune.pdfIn PDF document text
    • https://resicolor.com/upload/files/70830076429.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/65900200176.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160adc7ce6a2df---48339094690.pdfIn PDF document text
    • https://computerzone.pk/file/3947229453.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/38654246984.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/8e97ac0a600b9f2b51ceb8ec33d03fe6/85152678187.pdfIn PDF document text
    • http://evola.it/userfiles/files/wotugodimobupasuvijat.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/da4fc4b6153862a4db7d35e39017f0b6/43325061052.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/82854487413.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ea3a64eb1---lonami.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/xumepesafimozo.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_off0000f414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF414 18112 bytes
SHA-256: f2b9d383777b14ce8f465266b5edba5d26ee4d22e2ba0ee5a45802735bfb10c2
font_01_sfnt_off00012328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12328 10516 bytes
SHA-256: a06f39a1ca55936725e1f2f12a786b3ae8c5dbf93bf08e3a2c125a78c7ffd261
font_02_sfnt_off00013b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.