Malicious PDF — malware analysis report

Static analysis result for SHA-256 902ef1b6e953b25c…

MALICIOUS

PDF

74.9 KB Created: 2021-03-18 02:56:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cffd5ceb030adc57af50dd6e9177621e SHA-1: 3c1ba3c548a675128fd72aee70730f3cef56179f SHA-256: 902ef1b6e953b25c37af0422d8d4041e5027ec4ea2f105c43f5d8fc43794ff52
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/award?keyword=ncert+literature+reader+class+10+pdf PDF link annotation
    • http://kejoxemubogese.mywebcommunity.org/cloud_9_lyrics_dove_cameron_and_luke_benward.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/sql_server_interview_questions_for_5_years_experience.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/cgdhbku/jumewikoduj.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/bib5ghx/bewuminimejinisag.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/cojf2DJ/carriage_house_inn.pdfIn PDF document text
    • https://cdn.sqhk.co/rorexamuviz/9SHjwij/asana_pranayama_mudra_bandha_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilogifuxe/XhjijAG/15951297532.pdfIn PDF document text
    • https://cdn.sqhk.co/dufikibagi/7nbieDy/bipekutinaxapotuxemiragel.pdfIn PDF document text
    • https://cdn.sqhk.co/namulofilox/iijzOPi/dixajojanixenugabusu.pdfIn PDF document text
    • https://cdn.sqhk.co/vudemijugamu/vqigchi/7513495022.pdfIn PDF document text
    • https://cdn.sqhk.co/lasesekov/d8YZhce/hello_movie_guitar_music_ringtone_download.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/iheyInf/wormate._io_gra_poki.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/tisegovofu/uses_for_router_guide_bushings.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/letter_x_worksheets_for_toddlers.pdfIn PDF document text
    • http://maretubozewugi.myartsonline.com/lutivagiginitinapedijodo.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/singular_and_plural_worksheets_for_3rd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/pamoxajelofinagodalamatig.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/wewisetepenuzatimaxejuwu.pdfIn PDF document text
    • http://wegamaluperetuj.atwebpages.com/faded_easy_piano_sheet_music_free_printable.pdfIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/wisiwi.pdfIn PDF document text
    • http://wewamamewiler.atwebpages.com/adaptive_autosar.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/hyperdimension_neptunia_mk2_trophy_guide_and_roadmap.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/unable_to_connect_to_wifi_hotspot_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/34838448861.pdfIn 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_off0000ec6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6C 5312 bytes
SHA-256: d7fe796876dbcb3dcace9ed92eb4af471418859834c7a27abcfa1576cad2097f
font_01_sfnt_off0000fe93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE93 10916 bytes
SHA-256: 97d099447f6b8a2955b8bbb4a1f32e2904d6e72571256ee2d2844a7bab459396

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