Malicious PDF — malware analysis report

Static analysis result for SHA-256 f88f9294c26b1ac3…

MALICIOUS

PDF

78.4 KB Created: 2021-03-14 11:07:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4cca55df57a82444bd2bc8306b3e5a4a SHA-1: ce44d1055a3fb471ced0718b6705999afda3213b SHA-256: f88f9294c26b1ac3d287c975f389b254f42cf911af74fa1505d1f38ddc8b393a
126 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded URLs, many of which point to disposable domains or potentially malicious hosting. Heuristics indicate it functions as a link farm, with a high ML score and ClamAV detection confirming malicious intent. The embedded URLs likely lead to phishing sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://vilenefex.ru/award?keyword=administrative+law+south+africa+pdf PDF link annotation
    • https://cdn.sqhk.co/lodikorep/difgcZg/nba_live_stream_free_facebook.pdfIn PDF document text
    • http://khareedforosh.com/thermos_grill_2_go_coolerlz0pc.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/fNDaaJJ/telugu_love_ringtones_download_mp3_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450721/normal_5fcd5ba0d962b.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/82584015989.pdfIn PDF document text
    • http://pogadai.xyz/cross_dj_sampler_appaeim1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462341/normal_604b70da78793.pdfIn PDF document text
    • http://mihetos.xyz/607272668282sy16.pdfIn PDF document text
    • http://mezoterilijixa.22web.org/prepositional_phrase_practice_worksheet_4th_grade.pdfIn PDF document text
    • http://memexeti.66ghz.com/automatic_call_recorder_android_app.pdfIn PDF document text
    • http://ruzazeruduzelu.22web.org/overtime_form_government_of_canada.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476437/normal_5fc6df72a466b.pdfIn PDF document text
    • https://cdn.sqhk.co/bifugudawesu/icjghak/snapchat_score_streak_record.pdfIn PDF document text
    • http://fsfsfd.xyz/pokemon_crystal_breedingx49gm.pdfIn PDF document text
    • http://gujufifirisin.22web.org/soundcraft_ui24r_software_demo.pdfIn PDF document text
    • http://soul-felt.com/what_do_the_lights_on_a_trickle_charger_mean3oxrk.pdfIn PDF document text
    • https://cdn.sqhk.co/sategexarom/4idnghu/vokifipojibimumunija.pdfIn PDF document text
    • http://nexofozupugasi.mywebcommunity.org/dbt_skills_worksheets_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tebimanapedupun.epizy.com/algebraic_geometry_and_statistical_learning_theory.pdfIn PDF document text
    • http://fewodekikagusag.rf.gd/xalezefelam.pdfIn PDF document text
    • http://maretubozewugi.myartsonline.com/who_is_collier_landry.pdfIn PDF document text
    • http://lenepozomewu.epizy.com/54006919229.pdfIn PDF document text
    • http://kuzojepume.epizy.com/developer_android_bluetooth.pdfIn PDF document text
    • http://rovetenexosa.rf.gd/gta_v_hangar_missions_guide.pdfIn PDF document text
    • http://juzelipa.rf.gd/wozenakafoxudux.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_off0000f33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33F 5536 bytes
SHA-256: 67f4f76ab7ccad4b13aee7f8f7f677746d282bcd31afd388867dae983b3e6e14
font_01_sfnt_off000105fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FB 10880 bytes
SHA-256: ca71ef4e6fec48bd62ff8f6e08e8841a5353e140c5358b89d3ba144de006fd97

Open this report in the interactive analyzer, or submit your own file for analysis.