Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea990685b86e418b…

MALICIOUS

PDF

77.1 KB Created: 2021-05-25 06:22:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7a415822fa7838dc0cc59508c8e6f73e SHA-1: e8887877639553c1028b246280a74927ee4fe7c1 SHA-256: ea990685b86e418b1620fcac2bdf4793fb55b1759276ed85f703d64133d5c137
156 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to 'pelibifir.ru' which is presented as a download link for 'pitch perfect 2 movie mp4'. This, combined with the PDF_SEO_LINK_FARM heuristic indicating a mass of external PDF links, suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://pelibifir.ru/strik?utm_term=download+pitch+perfect+2+movie+mp4 PDF link annotation
    • https://dodapufil.weebly.com/uploads/1/3/0/8/130813701/8576729.pdfIn PDF document text
    • https://wobomiti.weebly.com/uploads/1/3/4/5/134501920/sabuworape_jowawifez_debimadukoza_lupiwarivoxumi.pdfIn PDF document text
    • https://kibixaxetoro.weebly.com/uploads/1/3/4/8/134861284/90a56269576a05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pazovugal/sixeruvezefekimipise.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/food_banner_design_vector_free.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/ruvijuko.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/dell_dimension_4600_drivers.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/titoraniruselit.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/bacilos_gram_negativas.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/greek_gods_and_goddesses_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/bokageseku.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/solid_waste_management_journal_articles.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/bapulopiperuxuriz.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/jobujunawolapil.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/tinevodatawevenedow.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/19218075295.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/fishing_report_upper_green_river_wyoming.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/16186968660.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/pidejafexoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/nalunumakadaw.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/dirt_devil_vibe_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/aankhen_2002_movie_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/google_sheets_merge_cells_shortcut.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_off0000efbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBB 5588 bytes
SHA-256: 4999ffe9ab08265728f2706015684e06ebaa24ec15a30e2b97871f823a7e321e
font_01_sfnt_off000102bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BF 10660 bytes
SHA-256: 4f253d908958c1c525131c6d6098449303beb45280e0aa2ef0d231baa5c2c75d

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