Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5ded3bbb5c71ae…

MALICIOUS

PDF

71.8 KB Created: 2021-03-28 08:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3180f53de929cba4d6a6e44ab3e33654 SHA-1: 5377854464719505fd912a1ad489c0f9148bebfa SHA-256: df5ded3bbb5c71ae75b33a45db2b538931c17f2fdcc2927a0819c8403a7541e7
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by both ML classification and ClamAV, with a high risk score. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. One of the embedded URLs, 'https://soxebez.ru/123?utm_term=botim+for+android+4.+1', is flagged as unknown reputation, indicating a potential phishing or malware distribution vector. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure points to a malicious intent to drive traffic to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/123?utm_term=botim+for+android+4.+1 PDF link annotation
    • http://xijulefabogi.getenjoyment.net/studio_5000_logix_emulate_price.pdfIn PDF document text
    • http://feremujidonigu.getenjoyment.net/55375177270.pdfIn PDF document text
    • http://valigulepi.scienceontheweb.net/qu_es_un_conjunto_en_matemticas.pdfIn PDF document text
    • http://punubukotulanes.22web.org/5836869436.pdfIn PDF document text
    • http://lejifip.sportsontheweb.net/a_thousand_years_piano_sheet_music_free_download.pdfIn PDF document text
    • http://linorusani.iblogger.org/91049674472.pdfIn PDF document text
    • http://kabomodom.iblogger.org/resumen_de_el_libro_del_mundo_de_sofia_por_capitulos.pdfIn PDF document text
    • http://guwugil.22web.org/accountable_talk_cards.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://63c5840e-267c-49ed-94d3-fc9f9d8b9c0b.filesusr.com/ugd/8c5bc8_e9763fb94fa946fe96d8a9c1ac99ca78.pdf?index=trueIn PDF document text
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_7dd0634a9aaf44e2a16fa632248f11d1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/goodnight_moon_lyrics_go_radio_meaning.pdfIn PDF document text
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_c6f0acca696f4f499dca852addac90a3.pdf?index=trueIn PDF document text
    • http://zatejufeg.rf.gd/bhagavad_gita_kannada.pdfIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_b8cb54a61551447791264ca41490a6bc.pdf?index=trueIn PDF document text
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_eceb9fbba7be4ad4bf5b0e427fc22c32.pdf?index=trueIn PDF document text
    • https://054d5c26-596f-48a3-87a7-0fc79031e5db.filesusr.com/ugd/599026_e1d3c3736601452bad6bedf3daeb42a0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/patotale/reflective_writing_assessment_criteria.pdfIn PDF document text
    • https://288c7b4b-0494-48f6-8ee2-9dd519b96b0a.filesusr.com/ugd/a107db_17dd3cf85d484567b9c59d29620e1563.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/xixovebezapedev.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/browser_terbaik_tanpa_iklan_android.pdfIn PDF document text
    • http://kataribijinezej.epizy.com/23128149074.pdfIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_ea59e57c04b842dea060479903b58251.pdf?index=trueIn PDF document text
    • https://62abf401-5fc9-4991-ac00-cb6a0c8cf8ec.filesusr.com/ugd/e4ff69_fac75914f0054635adc8f1cb6f57b76f.pdf?index=trueIn PDF document text
    • http://rilokew.rf.gd/rekapekinozudogegaxagini.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/85874722336.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_off0000dbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBF 5064 bytes
SHA-256: 531858a2c14fe26a90325c23371b99553ab241e60aa560e793c854052815df26
font_01_sfnt_off0000ecf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF2 10780 bytes
SHA-256: b9ec7cff5438c85368562ab57df5e1a15f6a4eb57ff069f6fdc0edde4f6230a6

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