Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e638a603834dea6…

MALICIOUS

PDF

108.6 KB Created: 2021-03-17 12:41:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d34d0e13eec1e0c07d93564d97056d05 SHA-1: 504747f731893aa2935c05976a474796ec768fa8 SHA-256: 7e638a603834dea6d7e2e16b9abf8553926237571b5024cfa46548d45a3b9997
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicating a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/award?keyword=fitness+trampolin+%25C3%25BCbungen+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4427282/normal_5fe0fa19b86b9.pdfIn PDF document text
    • http://lnstagramcopyrightservices.org/35681047307miyzm.pdfIn PDF document text
    • http://copyright-infringement.business/what_is_the_story_of_hansel_and_gretelr1day.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417313/normal_601b39a068386.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386076/normal_5ffa89699e1ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500895/normal_60243cc28702b.pdfIn PDF document text
    • http://getveran.site/wizawujedubuxorodzl5d0.pdfIn PDF document text
    • http://reduslim-europa.site/aula_2_espaolnd122.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/attendance_management_system_project_free.pdfIn PDF document text
    • https://3d3b31fc-6152-41c7-b1d4-a4af3afcce63.filesusr.com/ugd/3f8d85_94a6710716404b329cd77076fba38945.pdf?index=trueIn PDF document text
    • https://06ebba1c-c738-45d4-b58d-83edbdcc9420.filesusr.com/ugd/b14caa_9840424c6c7241448103bff0e4530dcf.pdf?index=trueIn PDF document text
    • https://6e3eaeb2-b9dd-4462-8b56-96c59beebd9a.filesusr.com/ugd/dcc11b_489bccfbc88045ceb7328f4cecdf4ae0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tosego/gmail_app_android_add_account.pdfIn PDF document text
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_ca9d5a4f4f584c0eb1f4cea2bd9005f6.pdf?index=trueIn PDF document text
    • https://19aaccd0-9772-41b6-85c4-be118606641a.filesusr.com/ugd/a12125_7b7404577953496dad0a01e120900a8f.pdf?index=trueIn PDF document text
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_db925daaa0c04195ad4ac699f821f131.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/gonaji.pdfIn PDF document text
    • https://db244590-af71-4c33-bd6e-2f8f55f31281.filesusr.com/ugd/fdab61_5c13070f984642408e70d8e045d0e2f8.pdf?index=trueIn PDF document text
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_800c84c7f5bc477899e72376e5d55ba9.pdf?index=trueIn PDF document text
    • https://91506351-5699-48ce-85e7-8e7d071f4e87.filesusr.com/ugd/d775a9_1edbb792435342a687f442d23046be9f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xupimaral/best_love_quotations_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/log_and_antilog_table_file.pdfIn PDF document text
    • https://62abf401-5fc9-4991-ac00-cb6a0c8cf8ec.filesusr.com/ugd/e4ff69_ce17d52e4d4e4554b41f442d9213d572.pdf?index=trueIn PDF document text
    • https://9e1e9198-0fe7-4103-8084-fdcc6befb8d5.filesusr.com/ugd/2f7815_3d05db11e1674e0a902e2b9c7df13923.pdf?index=trueIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_027840537f884b828b6bf40e7bc6bbdd.pdf?index=trueIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12885 6744 bytes
SHA-256: ffeb89eaad713c9717385028f79c9757067aafb2c2382ea8cbab0e6efe35a425
font_01_sfnt_off0001393c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1393C 2952 bytes
SHA-256: 6f6c5a8fb5e62cfd2b6ff76f758e0f05a98695d5bac735cd019a42cb5e5649ba
font_02_sfnt_off000143c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143C9 5576 bytes
SHA-256: 9b587c1d40e7f938f08dc9ef79982f17db879cd23ff096ee126469e33bdfd0ad
font_03_sfnt_off0001566a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1566A 2120 bytes
SHA-256: 593d873fa08423e7ead59b01314a4ee04551ac9d9ef78e6b1dc9d39461d3d42e
font_04_sfnt_off0001600d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1600D 12372 bytes
SHA-256: 9314e96bc12eed3529da6dcccc2603bbca0e38194bc731fc059ea6a8c908b3ef
font_05_sfnt_off00018870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18870 17260 bytes
SHA-256: 308b6478710277949cb083b0c235d7f89ed1a61013c954f0c2081dcb5e3df983

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