Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c460909dbd5f7f…

MALICIOUS

PDF

85.2 KB Created: 2021-03-12 17:32:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 452cb8e8efa4f16b9b0732622c8a3958 SHA-1: bb976355122ff5752fe47f6a8294689edfc4e7b2 SHA-256: 95c460909dbd5f7f41a30c415b4594faf9eda0fff82a265795b1d4b303cc6db2
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, many of which point to disposable hosting and are designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a link farm designed to obscure the true destination, further supporting a phishing or scam attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://jacksth.ru/award?keyword=bursary+application+form+2020+pdf PDF link annotation
    • http://xoziduso.mypressonline.com/imperfetto_o_passato_prossimo_esercizi.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/what_are_the_three_theories_of_motivation_in_psychology.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500665/normal_602334cb4ab79.pdfIn PDF document text
    • http://svoydvalend.xyz/27450012287odqa3.pdfIn PDF document text
    • http://obschee.xyz/dotabotagadele555y.pdfIn PDF document text
    • http://voyazh-shina.com/aavesham_movie_in_telugutbd7w.pdfIn PDF document text
    • http://bezerojiw.scienceontheweb.net/essay_written_in_apa_format_example.pdfIn PDF document text
    • http://xanuxitawunavi.iblogger.org/domino_jessie_j_piano_sheet_music.pdfIn PDF document text
    • http://vittorguxx.site/saucony_guide_iso_running_shoe87lu2.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/medical_device_quality_management_system_template.pdfIn PDF document text
    • http://xufaroruguvotel.iblogger.org/fejanigubava.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375077/normal_603c2af4103d5.pdfIn PDF document text
    • http://wavarev.22web.org/nivel_de_prevencion_primario_ejemplos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451027/normal_6015330d730de.pdfIn PDF document text
    • http://zizufiso.iblogger.org/hsc_marksheet_online_tamilnadu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495973/normal_601d06c7a4334.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/848a7bd1-7be5-4d6d-8b0c-e7f5e5fc95db/24325140153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51526def-bd67-44e6-8b7f-ab46c8d44ab4/84958985098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13bef70e-7657-49f7-af25-73066436cae9/bose_companion_3_series_1_review.pdfIn PDF document text
    • http://beperedusewigu.epizy.com/vizefabozalemaw.pdfIn PDF document text
    • http://loxometos.epizy.com/assistive_touch_apk_uptodown.pdfIn PDF document text
    • http://xutirekivob.rf.gd/kirepe.pdfIn PDF document text
    • http://gujoruxot.rf.gd/67075845524.pdfIn PDF document text
    • http://mimiwuzoxul.epizy.com/android_police_top_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd77c826-8e89-4e5e-8b65-01cb49610dfa/bitifi.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/sewenironudenigoz.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_off00010ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED6 5728 bytes
SHA-256: 846764d9c3ce00c13e184f7a68f96cdbd094f88ea8a90df9f071277a2f35d1e4
font_01_sfnt_off00012249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12249 10892 bytes
SHA-256: 4141ddb9c325ca75bbaa8fc30e36403a92d598772d6c40ee552c95d71aca8875

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