Malicious PDF — malware analysis report

Static analysis result for SHA-256 f306f6219e2e0153…

MALICIOUS

PDF

79.9 KB Created: 2021-04-02 01:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 02d07421f2c7807b3b429698d21f30db SHA-1: 5676097855e52128702a8af97d783559ab15644c SHA-256: f306f6219e2e0153d4c28ded34dc58ce4dd9f6ec66ea42a6c07ce9536bd1a4d8
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm or phishing operation. The PDF's structure and embedded links are indicative of a spearphishing attachment, designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://golowaki.ru/award?keyword=2020+world+cup+fixtures+pdf PDF link annotation
    • https://vigijamavo.weebly.com/uploads/1/3/0/9/130968937/e80dc989a0.pdfIn PDF document text
    • https://cdn.sqhk.co/bivosemubo/hjzjj3d/miss_universe_2015_philippines_answer.pdfIn PDF document text
    • http://giwepaz.iblogger.org/bajenid.pdfIn PDF document text
    • https://jatazuleb.weebly.com/uploads/1/3/4/6/134662889/pevuwolejak-mobudosafep-bewamokiluzesas-nijanotum.pdfIn PDF document text
    • http://lupelisizi.medianewsonline.com/how_did_positive_psychology_start.pdfIn PDF document text
    • http://zovofuti.mygamesonline.org/novena_de_navidad_colombia.pdfIn PDF document text
    • https://dojapoxozali.weebly.com/uploads/1/3/0/7/130775013/fuvibikugafufajo.pdfIn PDF document text
    • http://modezewop.mygamesonline.org/30946520778.pdfIn PDF document text
    • https://cdn.sqhk.co/fupupusamun/qGieEOF/state_of_survival_codes_discord.pdfIn PDF document text
    • https://vesanalu.weebly.com/uploads/1/3/1/4/131482823/6574884.pdfIn PDF document text
    • https://cdn.sqhk.co/vinasujitupe/bghvibS/forgotten_hill_tale_portrait_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/eV4ghhj/namojidilepoxudodabuzezu.pdfIn PDF document text
    • https://cdn.sqhk.co/julukimesof/tV3aia0/dividing_integers_worksheets.pdfIn PDF document text
    • https://sijerixo.weebly.com/uploads/1/3/4/0/134042725/walikegul-rifivafofawafa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nabunuwo.epizy.com/workflow_and_approval_process_in_salesforce.pdfIn PDF document text
    • http://riberudedanute.epizy.com/cashing_in_on_the_american_dream_how_to_retire_at_35_epub.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/weripadarateri.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/how_to_use_technical_analysis_in_forex.pdfIn PDF document text
    • http://vutogebufuz.myartsonline.com/agatha_christie_poirot_book.pdfIn PDF document text
    • http://vomewudige.atwebpages.com/68646862056.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/how_do_i_get_my_dd214_from_the_marines.pdfIn PDF document text
    • http://nibemodida.myartsonline.com/ketilawini.pdfIn PDF document text
    • http://kepawomokatuke.myartsonline.com/how_to_prepare_for_physics_exam_class_11.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/bodybuilding_workout_program.pdfIn PDF document text
    • http://maxafatuvapare.rf.gd/editable_traditional_wedding_invitation_templates.pdfIn PDF document text
    • http://judutuv.epizy.com/nopedoraga.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/63841362568.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_off0000fb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB16 5280 bytes
SHA-256: 4a12f56957ca3f38b27c001dc6fdb5b7f1e24a9e07f04b9bd2ac328d1a3747e1
font_01_sfnt_off00010d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D36 11036 bytes
SHA-256: 3c149db8186cb5eafd69ffc03b381a1e4e4067bbb5284223ba89c5f97cd2d0bd