Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d0afd9c5992f357…

MALICIOUS

PDF

91.2 KB Created: 2021-06-30 08:32:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a366a42bba53df094e9e8f8e92c9c173 SHA-1: 2fb05de3414673c1b229d37668b3dce4665f6cbd SHA-256: 5d0afd9c5992f35779d874818c5927fcd6df4db121dccf25154ea72b9982ec43
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, many of which are hosted on disposable domains or use URL parameters indicative of link farms. The presence of these links suggests the document's primary purpose is to redirect users to potentially malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://irlanc.ru/uplcv?utm_term=speech+about+friendship+with+introduction+body+and+conclusion PDF link annotation
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d019d4ee45---77714811774.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/69c5038a8a763f8768bf1b464cbfc85b/lorosavukabevapopodomezek.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/zivanadevapipenogumiton.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/3gcgm0gtas2urm0uj3cg9dam9k/66127444379.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/96778280510.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/5094378155.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b796c2b778---vetibaxenamosel.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1608da1dcced94---64570486164.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb631bc159---xaraxapekot.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a88eacacb56---27088740053.pdfIn PDF document text
    • http://jkohut.pl/file/wubidigelasu.pdfIn PDF document text
    • http://sakem.org/userfiles/files/53093179674.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1dbe792d5f---59442384240.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/2ede02290f38c2aae324af30eb39b6a8/vifoxozowew.pdfIn PDF document text
    • http://irths.com/upload_files/files/47470400123.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/bu62tm9p82rlgkehik8uc25tcr/sesezone.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/10140428038.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b849b6b7ab---16982245543.pdfIn PDF document text
    • http://haniltm.kr/upfiles/editor/files/kupujudujelemif.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b41db950e3---49122060208.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/qn9drccdf4u2278uqlf1o8b7s1/nakarujupon.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c7c9e3daa---99272334910.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/9ifum7q8lvh032ceparuh0dlt1/62688791285.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/leldfqndel14fdm02ugsj0sh33/63822120595.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af79abeba8b---tobagawoxi.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086eb5e5645a---7266100534.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_off00010066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10066 11232 bytes
SHA-256: 6210b53f0b0d231b8653921019af609a5bcc85f7fd90d3715769b736a33e1c76
font_01_sfnt_off00011a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7F 17236 bytes
SHA-256: 09062c51195bc6fb3966ce122c431adc14e5d9c56153d9798830b731314d9223
font_02_sfnt_off000147c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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