Malicious PDF — malware analysis report

Static analysis result for SHA-256 983e3b2fd9275b06…

MALICIOUS

PDF

69.8 KB Created: 2021-09-26 06:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c9b6d419dc99b7f60099c3e02733eb33 SHA-1: 7f267e740a53a293523ec7a0f43303962a4d2c81 SHA-256: 983e3b2fd9275b068fc11ad5957cd39e348011f88d858bfc0b01c95af39cd7c3
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malicious content delivery attempt. It functions as a link farm, with numerous embedded URLs pointing to various domains, some of which appear to be compromised WordPress sites. The primary purpose seems to be redirecting users to potentially harmful content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://wastran.ru/uplcv?utm_term=top+unity+games+for+android PDF link annotation
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/90691962505.pdfIn PDF document text
    • https://kochitaxirental.com/ckfinder/userfiles/files/walojiximavomegawuga.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/91464592817.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/wafevibo.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/japebaxelasoregekofuvowu.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/zotavadi.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0925/376fd7c6a985655f168852496ccc2ecb.pdfIn PDF document text
    • http://kmbb.at/userfiles/file/34678192919.pdfIn PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/46915719840.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/sokeda.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/8780109ef4cc39db81430773449d5802/zawutasugufuvuw.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/67864942876.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/59598342084.pdfIn PDF document text
    • https://www.tyrtaios.gr/ckfinder/userfiles/files/63453855085.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161377efb9bdd5---kixisevuxegatapu.pdfIn PDF document text
    • https://noventa.cz/media/files/file/11565061864.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/82496394227.pdfIn PDF document text
    • http://airsoft1.ro/files/file/bivatunobugatizukokojuf.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614619dcb4544---kuvor.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/zidokubav.pdfIn PDF document text
    • http://syntra.pl/userfiles/file/50721642628.pdfIn PDF document text
    • http://protok.pro/upload/files/13250509097.pdfIn PDF document text
    • http://www.kotolantopeni.cz/files/39692790778.pdfIn PDF document text
    • http://bulmarconsult.com/files/65187318501.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/jafovusawizozapug.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_off0000b0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C2 10972 bytes
SHA-256: 35ca7a697f139a5c1b3a3047dbe027679cd7a4b1cde2675a56140bd9877832a6
font_02_sfnt_off0000e212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE212 14964 bytes
SHA-256: 4a44f10cadf3070b8117b1128e413dcf2507f6a49fc02c5a274168cfedacd37a

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