Malicious PDF — malware analysis report

Static analysis result for SHA-256 356f84758bf3ea93…

MALICIOUS

PDF

76.1 KB Created: 2021-03-04 09:57:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: b87d71500ed62b9d04cce9446fa4f8d3 SHA-1: d07d089b64e70146586d387d65753a993b559d47 SHA-256: 356f84758bf3ea9370ee18eab3c75a094651430fc29bc1b9309e5ca845d92892
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing. The document body, though heavily obfuscated, appears to be a deceptive lure related to search queries, designed to redirect users to malicious sites.

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
  • 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://ponafet.ru/wb?keyword=what%20are%20the%20conventions%20of%20a%20fairy%20tale PDF link annotation
    • http://snegny.com/piano_sonata_no._14_in_c-sharp_minor_op._27g53ge.pdfIn PDF document text
    • http://fixetufuzafix.22web.org/86430810478.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/que_es_una_propuesta_de_proyecto_de_investigacion.pdfIn PDF document text
    • http://vienvozvrat.site/dijotiwixujamu1ns92.pdfIn PDF document text
    • http://opticsystem.website/el_misterio_de_belicena_villca_gratis9vhdy.pdfIn PDF document text
    • http://prizinsta.site/57415729198y726w.pdfIn PDF document text
    • http://qwert-ita.fun/financial_statement_report9vqw7.pdfIn PDF document text
    • http://gadatoreneperil.mygamesonline.org/can_i_use_google_maps_on_my_apple_watch.pdfIn PDF document text
    • http://woxijakuzadajew.getenjoyment.net/home_maintenance_schedule_checklist.pdfIn PDF document text
    • http://ig-support-service.com/monasudawfs7h5.pdfIn PDF document text
    • http://autobuff.xyz/lobediviz33k6p.pdfIn PDF document text
    • http://kutagugiponapa.22web.org/jajogorapovoturoxuw.pdfIn PDF document text
    • http://easterthjg.com/22985382522f4u9m.pdfIn PDF document text
    • http://milanomoda-italy.website/knife_master_vs_roguej97vq.pdfIn PDF document text
    • http://tohld.in/160184098482cmh0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://turixupifebut.epizy.com/bmct_terminal_berthing_report.pdfIn PDF document text
    • http://xudixarosojem.epizy.com/elementary_differential_equations_rainville_7th_edition_solution.pdfIn PDF document text
    • http://rupevisa.epizy.com/colin_thackery_final_performance_bgt.pdfIn PDF document text
    • http://nazubaj.epizy.com/86551838969.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_off0000ebd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD6 5144 bytes
SHA-256: 7ffe578afa52365d1fac8a8545672ecc1ee92648f8d4a36ee462e7342f3dbcd4
font_01_sfnt_off0000fd6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6B 10976 bytes
SHA-256: d3b4f9c35f1ebea223522e68bca85a245c50e65845dfede9a8d3f1903ffff3c2

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