Malicious PDF — malware analysis report

Static analysis result for SHA-256 78582cad6e695a5a…

MALICIOUS

PDF

83.6 KB Created: 2021-03-04 16:48:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 1d78eb762c0891df057d2788ff9f569b SHA-1: 2294ed2fabade23be2f697a959e1c7e67c7b161a SHA-256: 78582cad6e695a5a6e24db47d987015118829ad0d4255d3839d9823b90b699b4
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which point to disposable domains and utilize UTM parameters, suggesting a phishing or redirection campaign. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves directing users to external, potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 4

  • 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://xajibur.ru/strik?utm_term=first+phase+of+green+revolution PDF link annotation
    • http://xaxefewina.22web.org/97358087351.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/wU7gdXX/dolobezamepeludumolugerow.pdfIn PDF document text
    • https://cdn.sqhk.co/darojopul/hgifZji/pezosupawopitedafef.pdfIn PDF document text
    • https://cdn.sqhk.co/vunelebu/DijBhm5/73959702208.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/E0UmDjf/hair_cut_3d_sound_mp3.pdfIn PDF document text
    • http://canlisohbetim.net/ministerial_briefing_note_templateqfca1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461751/normal_603dae6e132a7.pdfIn PDF document text
    • http://hookup673.site/daily_planning_template_free8dqu1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404740/normal_5ffcba292c9be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467004/normal_5fcc8dfea33d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371247/normal_5fd193f009534.pdfIn PDF document text
    • http://gufutaca6.xyz/xinumukolu6ocfu.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/f8cBGQN/gakobepapevofutugojife.pdfIn PDF document text
    • http://jgndegs.info/form_arcosanti_tickets_for_sale7702j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mezexefobotero.epizy.com/fagun_fagun_new_bodo_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/1742309168.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/kevekebolixit.pdfIn PDF document text
    • http://bitetam.epizy.com/redilapufago.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/amiibo_smash_bros_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/auriol_weather_station_4-_ld4437-_1_manual.pdfIn PDF document text
    • http://ponuruv.rf.gd/video_cutter_apk_app_free.pdfIn PDF document text
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_4dbaebd379614c2684951d2fd2896325.pdf?index=trueIn PDF document text
    • https://7a3463bf-3117-47cc-940f-ad9d50d05675.filesusr.com/ugd/9f2514_ca8d10a1bea24e8793cf92805d7035be.pdf?index=trueIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_9fb79cc8b21e4c56aab5fa9fd2f45fb4.pdf?index=trueIn PDF document text
    • http://nifiloxoburufi.rf.gd/97577667803.pdfIn PDF document text
    • https://0621cc9e-6449-4e8a-a8bd-baee9ad62a2c.filesusr.com/ugd/affb4a_23f8d8dcfbf1435a99f2c368b8e83cfd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fadedosi/symantec_dlp_admin_guide_14._0.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBED 5060 bytes
SHA-256: 19143cd4b4d8945b847bdd9a707bed0c0610e64f037815ac8cc1f52427a34b56
font_01_sfnt_off00010d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D25 10832 bytes
SHA-256: 683923da6a092c782c0ff772ee781b9ae79ee338547c9b769e282822d2ebb813
font_02_sfnt_off0001322a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1322A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34