Malicious PDF — malware analysis report

Static analysis result for SHA-256 2285a67a06c68c29…

MALICIOUS

PDF

146.2 KB Created: 2021-05-03 04:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ac92f936bb7f026cc2866ca429bcfb49 SHA-1: 739cab12955d6e44940a819ff4576513510b5c80 SHA-256: 2285a67a06c68c29fcecaa4b603e0a26994e0ade4e7025954a432ee4fddb7e4a
126 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 by heuristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://lozipotod.ru/strik?utm_term=watchman+nee+sermons+audio PDF link annotation
    • http://fesurowejo.mywebcommunity.org/winazoxawuparadu.pdfIn PDF document text
    • http://kefovatoxag.22web.org/free_telugu_astrology_book_download_birth_chart.pdfIn PDF document text
    • http://skidki-day.site/615821003346lu2v.pdfIn PDF document text
    • https://cdn.sqhk.co/xedomobedusi/fgjjcYq/gofolipifuvemip.pdfIn PDF document text
    • https://cdn.sqhk.co/rinulazopun/YiayJhi/excel_spreadsheet_debt_reduction_calculator.pdfIn PDF document text
    • http://datab.vip/nosajiloso4cu0m.pdfIn PDF document text
    • https://cdn.sqhk.co/vusabutam/cjhClIo/zexerozitikizuvesisado.pdfIn PDF document text
    • http://rijewomel.scienceontheweb.net/autoimmune_hemolytic_anemia_guideline.pdfIn PDF document text
    • https://cdn.sqhk.co/megeveze/dUhbcgc/91763497947.pdfIn PDF document text
    • http://zavulibalox.mypressonline.com/gogelipu.pdfIn PDF document text
    • https://cdn.sqhk.co/bobofibu/gjdbhbQ/bajrangbali_video_song_telugu.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosobupis/WZijLyw/fighter_pilots_aircraft_carrier_landing.pdfIn PDF document text
    • http://meine-gebuhrenfrei.com/3421011456801ace.pdfIn PDF document text
    • https://cdn.sqhk.co/pavujakorige/Agghdjc/youtube_vr_videos_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fagugawuw.epizy.com/gatefold_shutter_card_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/bsc_physics_syllabus_dibrugarh_university.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/piwupikagejaxuvibolet.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/14993904717.pdfIn PDF document text
    • http://dizowoxulokut.rf.gd/appreciation_certificate_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/fugep.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/23539749237.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_off0001dbbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DBBD 11988 bytes
SHA-256: d153f87eb114e0eeb72d9eb739e9355f13acefd3919255b4cb72adecc6f954df
font_01_sfnt_off000202bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x202BB 5160 bytes
SHA-256: 8bc5550a80782cacfd47d7b6707c8e1509cc7596d9e64f8e9ee2d47de8b98fe5
font_02_sfnt_off00021423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21423 11364 bytes
SHA-256: a0de5de84645aa61b4bc56449b0ee4c1de6b914a01c5fa5ed8dcd95495cd700b

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