Malicious PDF — malware analysis report

Static analysis result for SHA-256 30027c05422f1918…

MALICIOUS

PDF

74.6 KB Created: 2021-05-05 23:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6e7154b8b54eebeacaa3dd7015ecbcec SHA-1: cf13ab9092890a8531ac9a9bdd39fec23b286bbb SHA-256: 30027c05422f191805f5ffcd5232a7e7bceda809a0b06801a2efbccf66a49543
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple external URIs and is flagged by ML and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, appears to contain metadata related to a book title, suggesting a lure. The presence of numerous links to disposable domains indicates an attempt to redirect users to potentially harmful content.

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://xajibur.ru/strik?utm_term=psychology+an+exploration+4th+edition+free PDF link annotation
    • http://nyvelsets.online/what_draws_out_pimpleswhkit.pdfIn PDF document text
    • http://tukomibewi.getenjoyment.net/the_art_of_war_download_full.pdfIn PDF document text
    • http://shtampshop.ru/royal_mail_international_tracking_uksfe0c.pdfIn PDF document text
    • http://sizoxuk.22web.org/how_to_say_study_hard.pdfIn PDF document text
    • http://kazotapojiwi.mywebcommunity.org/south_african_traditional_food_recipes.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/why_do_we_write_research_papers.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://suporefebakibur.mygamesonline.org/dinike.pdfIn PDF document text
    • http://nozekem.iblogger.org/do_bookmarks_in_word_convert_to.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3ce02ae-d2da-4432-869d-02d5ede8e238/44740211398.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/vidmate_app_old_version_install.pdfIn PDF document text
    • https://587b455d-cc79-4428-8e80-a8b75ce23bca.filesusr.com/ugd/021ec8_a13a54fa2abd499faaff8b0e3f98044a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c88cff73-5698-479c-9640-f938a9c5ddf4/zisuzegezurovofisekuwo.pdfIn PDF document text
    • https://0bef8565-087b-457a-960c-b0529baba50c.filesusr.com/ugd/638000_b7c1ee71766c4d8f917f651412d0c8b8.pdf?index=trueIn PDF document text
    • http://nodasoxinakatag.rf.gd/fenidelerazuzedurijo.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/gutifuduwo.pdfIn PDF document text
    • http://xizujibonow.epizy.com/do_chest_expanders_work_reddit.pdfIn PDF document text
    • http://zovewopot.epizy.com/kabitexumexuwagi.pdfIn PDF document text
    • http://niwurekatexo.atwebpages.com/battleship_puzzle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf3ea5ba-4ec1-4127-b3f3-c020be6ffdc3/changer_cartouche_sur_imprimante_epson_wf_2630.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE273 5676 bytes
SHA-256: 663a41608ef06e828c56a7fb96d315fa7f82ff17ab650d25cf06815cf8dc0a7d
font_01_sfnt_off0000f5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E0 11260 bytes
SHA-256: 89fe4de96012aa75f543ed168ca81ac919d19b1854e9bc23b6aba74057dc70a0

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