Malicious PDF — malware analysis report

Static analysis result for SHA-256 c30cc2c96850f2cc…

MALICIOUS

PDF

60.6 KB Created: 2021-02-12 20:55:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fc2a30d9fc8daf59bd0e3c28f3a4610c SHA-1: 620462a3bd552aeb1283c3993bff0b4694ec7ca2 SHA-256: c30cc2c96850f2cc266f3bbb18920160ab6563078912e14ace86f2e65d389454
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. The ML classifier and ClamAV detection strongly indicate maliciousness, specifically a phishing or trojan variant. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest an attempt to drive traffic to malicious sites, potentially for phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/wix?keyword=commas+and+semicolons+in+a+series+worksheet PDF link annotation
    • https://nonesuwenuvav.weebly.com/uploads/1/3/4/4/134400251/mulazomuta_nenabizi.pdfIn PDF document text
    • http://giocodigital.website/vuzemokijunumavof8i1a2.pdfIn PDF document text
    • https://migawonakizize.weebly.com/uploads/1/3/1/6/131637147/217c7684.pdfIn PDF document text
    • https://duzozutilitu.weebly.com/uploads/1/3/0/9/130968921/vafivo.pdfIn PDF document text
    • http://gufopitasuwo.22web.org/44526441809.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/eIigicI/t-_rex_fights_dinosaurs_dominator_edition_mod_apk.pdfIn PDF document text
    • http://plsale.pro/rs3_corrupted_creatures_slayer_guidelvcll.pdfIn PDF document text
    • http://service-hire.com/ding_dong_merrily_on_high_sheet_music_piano357t4.pdfIn PDF document text
    • https://sutowuvo.weebly.com/uploads/1/3/4/6/134685384/4687347.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/jinabisura/juzilafakimigenini.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/fuzelitogolagipu.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/zoxudilelegidolunovumuve.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/fugue_in_g_minor_bach_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/72567901657.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/kerry_group_annual_report_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/bulbul_film_hd_video_songs.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_off0000b243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB243 5240 bytes
SHA-256: 2c0f3edaf8a82a4a9fef34ed824122af219e852d2c72c68d772ef3f5e5caee38
font_01_sfnt_off0000c3f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F0 9792 bytes
SHA-256: 6e3b2995a852d3b6c18ab1d37bcfa511a074564c398532ef2c2771a8f6e9a0dd

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