Malicious PDF — malware analysis report

Static analysis result for SHA-256 b06fd6e4c90ca7f8…

MALICIOUS

PDF

84.1 KB Created: 2021-04-02 15:16:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 28ee79bfe0cef61f8f2dafce002a095e SHA-1: 692d2a7bc1faf1ab0c5058bb84232b3cd0939e85 SHA-256: b06fd6e4c90ca7f83f5690c883fb08d92a793f8028a3a30d2eb677ef6f1bf293
166 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata suggesting it's a technical document, likely a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jottigo.ru/strik?utm_term=how+to+factory+reset+alesis+dm10 PDF link annotation
    • http://joy-todays.online/63246861911s5vsj.pdfIn PDF document text
    • http://3bureaureport.info/cuanto_vale_un_metro_cubico_en_centimetros_cubicos0gw9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_5fea356a392ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502870/normal_5fce4da04efe3.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/ehhjzic/wamonebomofigofil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401994/normal_5fdabfb37f8d7.pdfIn PDF document text
    • https://cdn.sqhk.co/nosimasiv/ifghegi/epic_games_2fa.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/jfjgv9H/travian_kingdoms_wiki_tr.pdfIn PDF document text
    • https://cdn.sqhk.co/juwafajem/S3jgBib/free_train_simulator_games_for_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/zivugeri/HggviaG/video_call_santa_claus.pdfIn PDF document text
    • https://cdn.sqhk.co/temejikowewa/23jangF/javesujas.pdfIn PDF document text
    • https://cdn.sqhk.co/gepabafi/dgglshJ/my_talking_tom_friends_mod_apk_download_an1.pdfIn PDF document text
    • http://natur-green.fun/11998109850ltbj7.pdfIn PDF document text
    • http://aduo5.online/5g_mobile_and_wireless_communication_technologynkb57.pdfIn PDF document text
    • http://goods-amzon.com/fun_writing_exercises_for_adultsvcbc7.pdfIn PDF document text
    • https://cdn.sqhk.co/gimexigerub/licUsge/kick_the_buddy_gameplay_1337.pdfIn PDF document text
    • https://cdn.sqhk.co/josutupamav/jcIjbji/sunizo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454556/normal_5fff96adee923.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zonivezada/if_you_care_baking_paper_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03f96e95-0805-476b-8de0-e9531be938a7/fijigudikikoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5afa3f93-0a94-4f1b-9505-c263f1426d22/67750238099.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/faveranugaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2035b06f-2141-4eff-9200-57dbc5d8011b/jbl_flip_3_se_connect_button.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/baasha_movie_song.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_off00010c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3C 5516 bytes
SHA-256: 70046a66d00b0dda3fca79e0fa428b69210268e9700fd9228f4eb4117c5fb2f6
font_01_sfnt_off00011f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F02 10464 bytes
SHA-256: 920a936653ce4e01a5109ddf4f018e3e5a36ce6a0acc91a2e2ac592ea7ead90e