Malicious PDF — malware analysis report

Static analysis result for SHA-256 4240166ff2236316…

MALICIOUS

PDF

78.4 KB Created: 2021-03-24 18:27:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 6ccf0c08fa9c67b8984b7eb7e33e8f6b SHA-1: d85a64f18f7287c15fb66f45b12e8028a72c7ebd SHA-256: 4240166ff2236316bc788159d77d90c4ecce97619e0d085f5336fa21565dd66a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, many of which are designed to mimic software downloads or legitimate content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/123?utm_term=appserv++windows+7 PDF link annotation
    • http://tamekawarol.66ghz.com/street_fighter_3_android_apk_free.pdfIn PDF document text
    • http://paksorond.xyz/10146393011h4u6j.pdfIn PDF document text
    • http://job-finder.space/keurig_k_cups_hot_chocolate_sugar_freeriis5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414172/normal_60261f32547ea.pdfIn PDF document text
    • http://gebameguw.iblogger.org/md5_mental_ability_test.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465701/normal_5fe670a009416.pdfIn PDF document text
    • http://ptmonline.ru/flutter_bottom_sheet_github296l0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461748/normal_603446a232d52.pdfIn PDF document text
    • http://trudogoliya.online/goflex_home_forgot_username_and_passwordyd0df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463809/normal_5fd2cdc68bdc5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xujezajonibibop.epizy.com/free_templates_bootstrap_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/tejaxotajexudavujujuzopo.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/love_languages_list_quiz.pdfIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_8fd15445509c4191a150a91d21052e02.pdf?index=trueIn PDF document text
    • http://riwexakax.epizy.com/sanovagapek.pdfIn PDF document text
    • https://5121d360-3808-4f61-aa44-d87cf2d9d428.filesusr.com/ugd/032e8a_d2e469ff5cef4f39a5199be9c646d07d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fapaga/titulos_de_credito_definicion_doctrinal.pdfIn PDF document text
    • https://2c9641c8-5874-4869-9b94-f1378e60aa6b.filesusr.com/ugd/efc1f6_fabe3c0513364ee98f9a093b27da53e3.pdf?index=trueIn PDF document text
    • http://kebugitop.epizy.com/ultrasound_guided_deep_peroneal_nerve_block.pdfIn PDF document text
    • https://f4e740b0-69d0-4d5c-a0c7-362dc6b2ad6d.filesusr.com/ugd/0356fc_ff7f27356f6743fbaedcf88d19872686.pdf?index=trueIn PDF document text
    • https://7e70056c-c2aa-4e53-98c5-50750123c107.filesusr.com/ugd/f8ae5d_d468bb06f28842a3872558742e55c778.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC9 4640 bytes
SHA-256: 9c623b19aa32312a9b2260eb9a2211da4bc59e9f1d5e0a329e9fae12aedecdff
font_01_sfnt_off0000faa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA2 10500 bytes
SHA-256: fe8b9da8e91e29bad5b07e7e1d82f97d79d64189fd95f8114dc63a774624edb7
font_02_sfnt_off00011e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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