Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef6cabd6839776e0…

MALICIOUS

PDF

74.6 KB Created: 2021-01-20 14:55:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ef675766bec7db2587f46e0bac2ac87f SHA-1: 82d7fe91e545803e9000f6f434c0026621b1e172 SHA-256: ef6cabd6839776e06d8f942074c4d7591bc3aac25aa8e7ed07c23f287231405f
162 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, and it contains a critical heuristic firing for a PDF redirector link to known malicious infrastructure. The embedded URL, https://cctraff.ru/123?utm_term=the+isle+hypo+carnotaurus, is the primary indicator of malicious intent. While no scripts were extracted, the PDF structure and the malicious link strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/123?utm_term=the+isle+hypo+carnotaurus In PDF document text
    • https://site-1166704.mozfiles.com/files/1166704/spiral_wound_gasket_types.pdfIn PDF document text
    • https://site-1168332.mozfiles.com/files/1168332/petroleum_engineering_companies_in_south_africa.pdfIn PDF document text
    • https://site-1194273.mozfiles.com/files/1194273/zotesola.pdfIn PDF document text
    • https://site-1168207.mozfiles.com/files/1168207/gaxepu.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/tuzamada/foraligarogewoxate.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/larval_forms_in_echinodermata_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/wigapatufebokuwisitumirel.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/linaf.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/17390291607.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/analog_science_fiction_and_fact.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/free_printable_handprint_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/13521024706.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/pusomufujus.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/bordeaux_2005_vintage_report.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/postgres_timestamp_format.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/java_1._8._0_121_for_mac.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_off0000e8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EB 5072 bytes
SHA-256: 02692db68b1d0bb7cbfc702522c9ca36d91ee705f167d16af46329252b35e8c2
font_01_sfnt_off0000fa2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2F 10272 bytes
SHA-256: dcc447aaeb6d2b85f3a2baeb7fd23a642f096067f23bbca77a93d4cfc46b829c

Open this report in the interactive analyzer, or submit your own file for analysis.