Malicious PDF — malware analysis report

Static analysis result for SHA-256 a46bf03343ca2620…

MALICIOUS

PDF

76.7 KB Created: 2021-03-19 13:41:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bae028daa7a186a89fd4f8856cec6003 SHA-1: b3679558d6351fa2abc4ecbd30cb4f18af2ebfc1 SHA-256: a46bf03343ca26209216686b0ef731ba66f7fdcc9c7e50da40adb344b3f6e8e8
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, many pointing to disposable hosting, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and the link farm heuristic suggest the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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 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://mezovuduw.ru/123?utm_term=html+form+required+asterisk PDF link annotation
    • http://prognoz-football.club/jivavuvudisovirizojupebugqgul.pdfIn PDF document text
    • http://gomuleg.22web.org/63040000774.pdfIn PDF document text
    • http://wide-mean.top/back_street_apparellgr5u.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxazagugura/Tjdjhel/mens_hairstyle_photos_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxegaxujifo/RVTgi3s/fumosesukawup.pdfIn PDF document text
    • http://xibipumazanepir.iblogger.org/mawalobuweke.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/heNzQgi/free_live_wallpaper_for_iphone_11_pro.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/dXielV3/keystrokes_mod_1._12._2.pdfIn PDF document text
    • http://afterdealer.pro/after_series_book_3_ending_explainediks4b.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelewexo/giuB6jb/how_to_write_a_successful_business_plan.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://zuraravata.epizy.com/sumokokelumaj.pdfIn PDF document text
    • http://xepadegi.epizy.com/assistive_touch_screenshot_android.pdfIn PDF document text
    • http://sugobuven.rf.gd/8571381954.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/flask_jinja_template_javascript.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/weather_whether_homophones_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/damememiful.pdfIn PDF document text
    • http://kaxogesidod.epizy.com/bejobabubibap.pdfIn PDF document text
    • http://tojozolatenizum.epizy.com/ncert_books_class_8_english_question_answer.pdfIn PDF document text
    • http://xubinexe.rf.gd/48243965266.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e25c2ba9-b222-4b84-ba3a-81d84a52c148/diburifuvefariwefolupegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10f93eff-745e-49a8-80d4-1db9055ffbbb/fogolozuwolenajugup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9924340-9290-4512-92ab-bd3a701de600/call_me_by_your_name_movie_review.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12F 4980 bytes
SHA-256: b9b81b135013ec6cbfb776f010723a709edda7a3b0f0c1c9f6b5e140eb3d3a5a
font_01_sfnt_off0000f215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF215 10804 bytes
SHA-256: 36ee324da9b861ece3baac3eabd936eb45dfd8c228e69886bed5f93462f9a879
font_02_sfnt_off00011712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11712 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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