Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f6bd62708ba5b6…

MALICIOUS

PDF

77.6 KB Created: 2021-03-01 03:07:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7cbbfb11e55e5a46224a544703325058 SHA-1: f39675a8b313f503edd8fdf38dbe63251e248542 SHA-256: e5f6bd62708ba5b6763bd060e00346efcdf8e0376b79fd3fda2dcd5016fa9d1d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely a phishing page or a download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://kuzutuzo.ru/wix?keyword=madalin+stunt+cars+2+6969 PDF link annotation
    • https://cdn.sqhk.co/zakolemafemo/fhh9jen/the_maze_runner_3_full_movie_watch_online.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/nnjfgec/tajodewumenewikujexapa.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/14559685944.pdfIn PDF document text
    • https://cdn.sqhk.co/pawexedibib/ehxoLgc/tati_sub_count_before_drama.pdfIn PDF document text
    • http://lowwsaw.xyz/melegabunudalutulafufp7b4h.pdfIn PDF document text
    • http://dle-tpl.site/9390412067333h9p.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/how_to_make_corn_bags_for_toss_game.pdfIn PDF document text
    • http://edapog.online/calendar_october_2020_to_september_2021mbf2t.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/bVjfdjc/photo_editor_online_collage_pixlr.pdfIn PDF document text
    • http://idealica-official.website/alejandro_jaen_discografiahs647.pdfIn PDF document text
    • http://nopuvobetag.mygamesonline.org/sta_rite_pool_pump_motor_replacement.pdfIn PDF document text
    • http://govnososal.xyz/google_adsense_app_apkpure7o6kh.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/nikon_f5_manuale_italiano.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/932071750902va9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fametofet.rf.gd/70684848710.pdfIn PDF document text
    • http://tumitodutib.rf.gd/how_to_sterilize_spectra_pump.pdfIn PDF document text
    • http://vubelifijam.atwebpages.com/3652492629.pdfIn PDF document text
    • http://rumapipenuwiwo.rf.gd/74735779153.pdfIn PDF document text
    • http://divapikej.rf.gd/telugu_new_love_feeling_songs_free.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_off0000f498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF498 5380 bytes
SHA-256: 92be6b248bf2f59ae4b8e5b89c6a30756f90797cfdcf1b0f5717a6c80026ae3d
font_01_sfnt_off000106f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F2 9992 bytes
SHA-256: c4e9b952dfc9f79b56902919d02045eb64943d8cdb7543795738b303e0586544

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