Malicious PDF — malware analysis report

Static analysis result for SHA-256 b03505fd7bd68969…

MALICIOUS

PDF

96.5 KB Created: 2021-04-02 23:35:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 37c3dc9e09ebba005f3a332634dd4ea6 SHA-1: 6cda08d25eb6cdeeb3a0a78ce5c7bf8b117e5ecb SHA-256: b03505fd7bd689694f91f1bb3e6185f6af1fbecdfc1036fb639a2d26eb330020
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an external URI pointing to 'https://xajibur.ru/123?utm_term=battle+for+wesnoth+descent+into+darkness+guide', which is likely part of a phishing or malware distribution scheme. The PDF also exhibits characteristics of a link farm on disposable hosting, further supporting its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/123?utm_term=battle+for+wesnoth+descent+into+darkness+guide PDF link annotation
    • http://rutefozur.22web.org/27387412047.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485445/normal_60527a35d81e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368266/normal_6033fb07db769.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sarowagilujet.rf.gd/nukezexevijuvar.pdfIn PDF document text
    • https://9005981c-20a7-4b93-9dfe-a591c0bc6fcf.filesusr.com/ugd/afbba5_d55be3e34ccf414ba80614ab9f3a170f.pdf?index=trueIn PDF document text
    • http://zefifimagami.epizy.com/ldc_2018_answer_key_12_august.pdfIn PDF document text
    • https://661c91a2-68a2-4ae3-aaac-ef96b6cc7894.filesusr.com/ugd/b926a8_dca3a25fb1544b20bb3839d6eb45a234.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ae4dfd6-77f1-4f39-8f50-324b6e4c378a/trivial_solution_maths_definition.pdfIn PDF document text
    • http://mimegovo.epizy.com/bagovinapitexitagomafojeb.pdfIn PDF document text
    • http://wezegene.rf.gd/tp_link_nano_powerline_manual.pdfIn PDF document text
    • https://bf5f3f24-cfb9-4aec-9f01-83e6d863dc5b.filesusr.com/ugd/1f4526_b5bb14abc6384e2e8abbf1fbffaed372.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c883c4b1-b644-4644-acc7-3b3af2ffad4c/a_series_of_unfortunate_events_netflix_last_episode.pdfIn PDF document text
    • https://a9f517e5-fea7-4905-b2b0-b00a2a9915ad.filesusr.com/ugd/d55797_60d694bddbab458cb788e8e8cee9cacd.pdf?index=trueIn PDF document text
    • http://fositelorefux.epizy.com/kensington_mouse_manual.pdfIn PDF document text
    • http://favigawesuwevo.rf.gd/50051289158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c7400e8-b1d5-4d43-8ccc-b995f367c2cd/nawodedazewiredolag.pdfIn PDF document text
    • http://garaloxuvenuwin.epizy.com/23637383662.pdfIn PDF document text
    • http://vulikoviluxugu.rf.gd/27017904005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad622c84-b335-494a-9853-6659073219b6/garasufupimupabupekiripi.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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CEB 5488 bytes
SHA-256: aef873532938402ed9355bb0d86804e8f00f24577fc76c6510d3f013d0dcde64
font_01_sfnt_off00014fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FA6 10852 bytes
SHA-256: 9f950445d8271db69619ede3b90e80db17b29cba5aeab258f41abe8669f25908

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