Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b6c527f3393fd7b…

MALICIOUS

PDF

80.5 KB Created: 2021-09-17 11:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ac0b690e649cb1bea4d7fa2cc130d5f2 SHA-1: 0d9e999bbe057fdc606726db782ab127d2889408 SHA-256: 1b6c527f3393fd7b8f9a093826f50bf4e5cc9c282be3ee55b4c255fa4cd7a29f
124 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs, many of which point to compromised CMS upload directories. The ClamAV detection indicates it is a phishing trojan. The presence of multiple external URIs and links to potentially compromised sites suggests a phishing or redirection attack designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3497

Heuristics 5

  • 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
  • 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://kme.pl/global/app/webroot/uploads/file/16315195678414.pdf In PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/iv2qcno33rome6p5c6gm10q726/ropakewegimubekijuko.pdfIn PDF document text
    • https://nstyapi.com/resimler/files/ripoxipixujigag.pdfIn PDF document text
    • https://museuminiaturesbesalu.com/files/pevatusirafufukevolag.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021090608162122.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/d6a2a26f6c3b00a92ae5598dc6146cb4/91190065075.pdfIn PDF document text
    • https://basalyemek.com/ckfinder/userfiles/files/bidexamobedifalowevanupi.pdfIn PDF document text
    • http://chanhungcorp.com/images/uploads/files/67212896497.pdfIn PDF document text
    • https://kfmaccounting.com/webroot/img/content/files/60909722953.pdfIn PDF document text
    • http://rurisnet.org/images/file/fimaparamaburedawak.pdfIn PDF document text
    • http://ottomaniantextile.com/userfiles/file/fepejalukikokofi.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/numinakarutidoretafudum.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/18900948281.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/95494713367.pdfIn PDF document text
    • http://1544-7419.net/upload/fckeditor/file/46321453253.pdfIn PDF document text
    • http://zerosquareonline.com/file/85917282890.pdfIn PDF document text
    • http://archidaldegan.eu/userfiles/files/dekirofu.pdfIn PDF document text
    • http://craftland.de/res/wysiwyg/file/kuvulajutuziwuroxipuza.pdfIn PDF document text
    • http://paddockj.com/user_data/editor/ckfinder/core/connector/php/upload/files/28562074723.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/31525170333.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/e4foiu558sh3g65kc656uv4l57/jaxuko.pdfIn PDF document text
    • http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/jimuzoxinekufibenatok.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae6ed8dcd6---9215138571.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=use+your+phone+as+a+firestick+remotePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EC 18344 bytes
SHA-256: 8f2afc553b5a6c78921dbed23851b9b88a8446e235bfc0fd593edf95668b3928
font_01_sfnt_off00011731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11731 11012 bytes
SHA-256: c462dfe51f1a36603aed883827fe4ea984440e858b9a4791dc3dec47b9be150b

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