Malicious PDF — malware analysis report

Static analysis result for SHA-256 72da244eb5ef3b4a…

MALICIOUS

PDF

65.4 KB Created: 2021-02-26 18:47:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3291a5cb957e6d9fc3e8d3d2609c61ec SHA-1: 2aad80cd79be73e6385fa930f0983b47f4ab724d SHA-256: 72da244eb5ef3b4ae2232ba5d1d0e6b43d29b21bb7c757a07d96c17e885a5dbc
124 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting or suspicious domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8429

Heuristics 4

  • 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
  • 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://leonvi.ru/award?keyword=how+to+fix+e5+error+on+hisense+air+conditioner PDF link annotation
    • http://wokulorumal.iblogger.org/black_sabbath_changes_sheet_music_piano.pdfIn PDF document text
    • http://citimart.online/kilipuremimujidamii0c3t.pdfIn PDF document text
    • http://sunny-web.ru/2016_cherokee_trailhawk_manualsvi0f.pdfIn PDF document text
    • https://cdn.sqhk.co/jefulajidi/igZheol/77193412607.pdfIn PDF document text
    • http://wegijezunulej.22web.org/siruthai_tamil_movie_video_song_free.pdfIn PDF document text
    • http://copyrightshelpscenters.com/wilderness_survival_guideza6xx.pdfIn PDF document text
    • http://jodopafipunew.22web.org/megowinoxapabatisinovefo.pdfIn PDF document text
    • http://mexicotop3.xyz/57639233810z80o5.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/gbYBYie/kuwokofewopokekimipib.pdfIn PDF document text
    • http://katowad.22web.org/structure_and_function_of_text_editor.pdfIn PDF document text
    • https://cdn.sqhk.co/zobunifi/3o4hb3U/zopewu.pdfIn PDF document text
    • http://jopuvalipi.22web.org/6250758572.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gototura.myartsonline.com/yamaha_mg10xuf_10_channel_mixer.pdfIn PDF document text
    • http://tadipakajare.rf.gd/frick_hdi_compressor.pdfIn PDF document text
    • http://duvodix.myartsonline.com/mortal_instruments_city_of_bones_book_series.pdfIn PDF document text
    • http://piwuzodoxomox.epizy.com/how_to_say_rainy_day_in_japanese.pdfIn PDF document text
    • http://wivowutone.epizy.com/miviziwazotobazonokaxomu.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/how_do_i_start_bitcoin_trading_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/best_rifle_reloading_powder_for_308.pdfIn PDF document text
    • http://fataragoreb.myartsonline.com/27983748916.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE435 5324 bytes
SHA-256: 2f00570a0253da8dedaf88c6b824f20078fa88ce00bd62a003c44dae66a24c0b