Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad59663bc69678e…

MALICIOUS

PDF

76.2 KB Created: 2021-05-09 11:40:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2fe42cfa2d5d6b421359b42471f210ba SHA-1: 89ff89f5bd028282fbe804000c61a8c729849d08 SHA-256: dad59663bc69678e48dced3f08f21779a8d3f85d865276f96bbbd684359db1fa
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs further supports the malicious intent of directing users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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.
  • 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://bologen.ru/strik?utm_term=o+que+s%25C3%25A3o+sistemas PDF link annotation
    • http://naturebiolog.space/51075424716zmdm0.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/QZhbEha/44239449181.pdfIn PDF document text
    • https://cdn.sqhk.co/runenuti/geVXhez/projectm_music_visualizer_pro.pdfIn PDF document text
    • https://cdn.sqhk.co/tifesijoja/ihr6jOJ/roku_premiere_plus.pdfIn PDF document text
    • http://supsun-aero.com/el_amor_en_tiempos_de_colera_espanolydg3m.pdfIn PDF document text
    • https://cdn.sqhk.co/pajelidul/hiaii6w/mejojulujilinumedaboz.pdfIn PDF document text
    • https://cdn.sqhk.co/rijunawep/9LFTITI/fosiguvalinaxesixuvu.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugewameru/3gfgfIc/clayface_boss_fight_arkham_city.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sanaxumidi.epizy.com/suxufuf.pdfIn PDF document text
    • https://51da6a7d-ee05-4a49-87ee-1b74af3aeb07.filesusr.com/ugd/b80405_4dd44719a52b49d982d70a57b94f2808.pdf?index=trueIn PDF document text
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_44e4917f9fd24222962f1ed49634da97.pdf?index=trueIn PDF document text
    • https://165abacb-5525-4e66-971c-c167d859e756.filesusr.com/ugd/f3f2a5_aeb69c7a875a4b3c93de4eeca412b4ce.pdf?index=trueIn PDF document text
    • https://e590c0d9-b694-44fb-9862-47327b30d8b0.filesusr.com/ugd/89363e_3464ac9fa4294396a08200a2e5978734.pdf?index=trueIn PDF document text
    • http://mevelidefa.rf.gd/singer_touch_and_sew_750_timing.pdfIn PDF document text
    • http://soxewimudinozuk.epizy.com/acuerdos_de_paz_firme_y_duradera.pdfIn PDF document text
    • http://dezezefisimel.rf.gd/pixark_for_android.pdfIn PDF document text
    • http://nukuliw.rf.gd/download_autocad_2020_tutorial.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_off0000e8aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AA 5172 bytes
SHA-256: 96f9272ffafe138d56f9d28a94caef4c98d9c2e045832550b79f336d79c16386
font_01_sfnt_off0000f9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A1 13244 bytes
SHA-256: 5e1aac32b76fd0b87825821cd60f55dcf179f647ef7fb246a4fb8acb4bc54c54

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