Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee9de48d0b73fef…

MALICIOUS

PDF

87.4 KB Created: 2021-08-18 12:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 385662d9cdf0626e83885af5931915fc SHA-1: 1d19dad6d7f06ee46eaae6771bf42eda007affba SHA-256: eee9de48d0b73fefd1134d445749dfd1968a16a074e98ded3bb250ffe15bf3c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to numerous external URLs, some of which are hosted on compromised WordPress sites. The primary purpose appears to be phishing or directing users to malicious content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://dm288.com/slicice/file/dusokumikuzaxozudube.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16072b484883d4---wajuteboxujuvejadumuxomij.pdf
    • https://ecohort.com/userfiles/files/kupituzanimixotulofof.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb7767b200d---59752081791.pdf
    • https://babamore.com/upload/ckfinder_temp/files/20210609060212.pdf
    • https://pointvirgule.ca/upload/editor/file/zuravabuzefomijozu.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/n7i2tk9olrngu3hrkc0tsq1akd/89037391684.pdf
    • http://cana.vn/uploads/userfiles/file/samegalo.pdf
    • https://ckmusicdesign.nluserfiles/file/magewuwazerutezapolajibok.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/2bmmbdc44uei8ikk1sa9m3mk69/rifonov.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817a2412bfb---fexomapusivafaxopivo.pdf
    • https://delphin-restaurant.com/ckfinder/upload/files/71396038002.pdf
    • http://klasykarozrywki.pl/public/images/fck/file/dowefagomubogiwekoxofata.pdf
    • https://dodatkireklamowe.pl/web/uploads/files/dadujir.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/25041850046.pdf
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/106033c83da33d2442e69b735d7b7bad/jefike.pdf
    • https://manualismedicina.hu/fileok/file/jesepivato.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/70c570d58f8c889de2a3716e23547279/86797359866.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d34d31f96a---93233496541.pdf
    • http://thetuckerfamilyreunion.com/clients/67950/File/pafufor.pdf
    • https://west-holding.com/userfiles/file/73576653227.pdf
    • http://www.dr.schure.net/ckfinder/userfiles/files/91584220389.pdf
    • http://meskerjager.nl/media/files/10111878848.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160986f3f5545c---lesezaminanodebelubul.pdf
    • http://clubmaniacr.com/campannas/file/sikipamurodudapupejores.pdf
    • http://cuanhuaabshanquoc.vn/files/dejixoga.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=how+can+i+improve+my+listening+skills+in+customer+service
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1e4.bin
11e5f22add00a90bd6fffd3d0f872ac14098b27271776845a4fd1551826f43c3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E4 16808 bytes
font_01_sfnt_off00011cfe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFE 16792 bytes
font_02_sfnt_off00013515.bin
b54b119af4d02fca6a04480ec9258d3e997b56bbceab81c0b96769442fc30c56
pdf-font-stream PDF embedded font (sfnt) at offset 0x13515 11164 bytes