Malicious PDF — malware analysis report

Static analysis result for SHA-256 d40833c7d8bd5f32…

MALICIOUS

PDF

80.5 KB Created: 2021-03-17 16:12:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f7dafb0b1063535ae0031632e4d91407 SHA-1: cb8f32cf22ec87a7990f859ad36d3ee5cf68c06d SHA-256: d40833c7d8bd5f32dcda807956c523b2c3819c0b2781e61d1f59fbae300a2462
134 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of invoice-related language suggests a phishing lure, likely directing users to external URLs for further exploitation. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://maypoin.ru/wix?keyword=income+tax+calculator+2020+india PDF link annotation
    • http://instacopyrighthelpteam.com/ninja_samurai_assassin_herowpmgd.pdfIn PDF document text
    • http://cenderaoriginator.com/minecraft_castle_designs_step_by_stepk2lvf.pdfIn PDF document text
    • http://fikakutipid.mygamesonline.org/worship_songs_piano_sheet_music.pdfIn PDF document text
    • http://bottlechainworld.com/how_much_is_a_carry_on_suitcasemz4od.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/bosch_vision_500_series_dryer_parts_diagram.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/ejemplo_de_contrato_de_confidencialidad.pdfIn PDF document text
    • http://tvoeobrazovanie.fun/demon_hunter_guide_wow_bfamlbbu.pdfIn PDF document text
    • https://jokiwuruxuwam.weebly.com/uploads/1/3/1/4/131437523/jiluzajovele.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/nenopekimuvam.pdfIn PDF document text
    • http://iblack.space/is_caron_cakes_yarn_machine_washable8hsac.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/how_to_study_for_acls_certification.pdfIn PDF document text
    • https://fumubesoxumus.weebly.com/uploads/1/3/4/4/134485348/sosiz.pdfIn PDF document text
    • http://tokiridevifo.medianewsonline.com/vezim.pdfIn PDF document text
    • http://fixmarker.fun/bosch_glr225_instruction_manual94z9g.pdfIn PDF document text
    • https://revapukas.weebly.com/uploads/1/3/5/3/135323612/cb210b.pdfIn PDF document text
    • http://vozivovog.scienceontheweb.net/57033952066.pdfIn PDF document text
    • http://googsnat.space/ricardo_milos_wallpaperq3jhk.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://gumusimigogasuz.onlinewebshop.net/73869217645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/985062f1-9a3f-473d-9989-2cbd6ff62f9e/28119342547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc968920-457a-4d53-86e8-2558857acbf8/sparknotes_the_scarlet_letter_chapter_17_translation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9175b8a9-000b-48af-b676-4f3f3a2d28fa/urology_cpt_coding_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62b99561-3113-4877-b1c3-439db0666a02/descargar_formato_de_contrato_de_arrendamiento_de_local_comercial_para_imprimir.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_off0000ed9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9A 5068 bytes
SHA-256: b5f59d761eb997a684d2c56a44f321274b3fe48e8caa96f5d9b131cf5fa1b097
font_01_sfnt_off0000fea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA2 11248 bytes
SHA-256: 7a086646df6f6c4b2aab845e77cb98d0b7a76c33ec5f3ce272aa90dcccf60543
font_02_sfnt_off000124dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176