Malicious PDF — malware analysis report

Static analysis result for SHA-256 fac7137cf455dbc3…

MALICIOUS

PDF

72.4 KB Created: 2021-02-25 17:58:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4da2be17698aedffe5f9aa98d5023efc SHA-1: 7cb3d5eddec6823fed4f1ccaa20da2aa281aecc6 SHA-256: fac7137cf455dbc3057cc3013ae6eb91e77a1d62d5c9cc842acf03d91582ecd5
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URI points to a URL that mimics a search result, likely to trick the user into clicking it. While no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to lead the user to a malicious site, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wb?keyword=oedipus%20rex%20by%20sophocles%20sparknotes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454672/normal_5fce288ea57a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452621/normal_60230e6286ee4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419437/normal_5ff67299c0b69.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411001/normal_5fe4f6812468b.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/pevarijidasalop/73043376080.pdfIn PDF document text
    • http://nijopupeboxisa.epizy.com/59548094134.pdfIn PDF document text
    • http://dibulorofo.epizy.com/method_statement_for_asphalt_road_construction.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/pafibimekavugexage.pdfIn PDF document text
    • http://wexuboguke.epizy.com/daxawu.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/wonirerifabuwubiwovuneful.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/plus_size_formal_dresses_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/tejabamarane.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/adquation_formation_et_march_de_l_emploi.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/wwe_super_showdown_results_grades_bleacher_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/zuropuxotivizodegobug.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/cgegis_table_2012.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/bleacher_report_apple_watch_app.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/gesaffelstein_blast_off.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/what_does_dappled_mean.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_off0000dfcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCD 5564 bytes
SHA-256: 8566714e770a0e5d678d5c957153831a39cf417e047e5ff5f47d80c5fe82f50b
font_01_sfnt_off0000f2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A9 9988 bytes
SHA-256: a321067ea790be6f2ada65308c54741de626a92e7853916fda4e2bb679ff86f5

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