Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba3ab6b7c1928dbf…

MALICIOUS

PDF

77.2 KB Created: 2021-03-16 10:43:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 52b6c2833ea8e37a6737824bff7a0ad7 SHA-1: 1c5919019af0f41c0d6ca6b1d4d2d63817d9bd95 SHA-256: ba3ab6b7c1928dbf8cb37789f29ec63f9b69a49083f6e78e19003e076049bb57
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, forming a link farm hosted on disposable domains, which is a common tactic for distributing malware or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to song lyrics and application metadata, suggesting a lure to disguise the malicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
  • 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://druttle.ru/strik?utm_term=the+power+of+love+celine+dion+song+meaning PDF link annotation
    • http://leketeko.22web.org/btn-_group_bootstrap-_select_form-_control.pdfIn PDF document text
    • https://cdn.sqhk.co/gesaxamadew/Igg6ujh/human_fall_flat_online_split_screen.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/gWjb7ia/final_fantasy_viii_remastered_ps4_walkthrough.pdfIn PDF document text
    • http://vanaruw.22web.org/pnl_el_aprendiz_de_brujo_descargar.pdfIn PDF document text
    • https://cdn.sqhk.co/lexewagoz/q9Bggjd/colornote_notepad_notes_download_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/dojaxeje/hh3ijii/diy_rockstar_costume_female.pdfIn PDF document text
    • https://cdn.sqhk.co/sijaxovada/gfgeN3r/can_you_use_airpods_pro_with_android.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/ig7TWhf/1443233468.pdfIn PDF document text
    • https://cdn.sqhk.co/bamosabubesi/Hjd9LuB/stickman_ninja_game_download_old.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380382/normal_60146bed90cf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492871/normal_602b5d68a3990.pdfIn PDF document text
    • https://cdn.sqhk.co/dikulodut/hcwNghR/etisalat_business_contact_number_toll_free.pdfIn PDF document text
    • https://cdn.sqhk.co/lodoseduler/YtjYjhX/modogiwenarujutisijax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368740/normal_5fe5d240af5e3.pdfIn PDF document text
    • https://cdn.sqhk.co/lodesejidi/iiogjjc/dungeon_keeper_game_guardian.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/khbeAib/92169307337.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vakorizu.epizy.com/webasewaxikukirezowafi.pdfIn PDF document text
    • http://vevaxadebelag.epizy.com/aparato_digestivo_conejo.pdfIn PDF document text
    • http://suxorodefis.epizy.com/notion_de_biodiversit.pdfIn PDF document text
    • http://fajamoluw.epizy.com/lenatozewutizisasediwa.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_off0000ec39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC39 5668 bytes
SHA-256: 9f44cbc83bfc28e4cb34c2b87a1054a39fda086be66d3e663275c4df83f6736e
font_01_sfnt_off0000ff6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6D 11248 bytes
SHA-256: 68340acc28e79ea9bd27cda7529c5fe5c91891782e5cc5ab304e1252007360d8

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