Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6e0ee4d5501e034…

MALICIOUS

PDF

80.9 KB Created: 2021-03-13 16:02:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7e779a6750d71a3346dbe4f1da62264e SHA-1: 937bc06001c4fbf4c6e105073262cca9a9cfd0c0 SHA-256: a6e0ee4d5501e034d19a3e55d585bc558bc05dd0241761c8aadcd00bcf15efda
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 0.9996

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://kuzutuzo.ru/strik?utm_term=moca+b+test+instructions PDF link annotation
    • https://cdn.sqhk.co/guwezasov/OfqvifO/samsung_a50_emergency_contacts.pdfIn PDF document text
    • http://migerov.xyz/excel_format_cell_first_letter_capitaltw9de.pdfIn PDF document text
    • https://puwoposujol.weebly.com/uploads/1/3/0/9/130969317/a744c.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/jiil7ja/zogejidufubux.pdfIn PDF document text
    • http://damita.fun/carnival_hide_and_seek_fortnite_creative_codeknc9l.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/jhLjejk/23447605808.pdfIn PDF document text
    • https://cdn.sqhk.co/gisusisabez/aUCifjd/zexakubez.pdfIn PDF document text
    • https://pebabole.weebly.com/uploads/1/3/4/6/134698512/vuxokezibebe_zafabuvopadedu_xirosevesafule_gojubinutilaf.pdfIn PDF document text
    • http://kurs1.xyz/insurgent_movie_freei0em5.pdfIn PDF document text
    • https://cdn.sqhk.co/peretudiwi/hbdgcge/block_my_ufone_number.pdfIn PDF document text
    • https://bivamotitujodo.weebly.com/uploads/1/3/4/7/134712473/sifagogibe-nedapur.pdfIn PDF document text
    • http://ogranicbio.space/lefefijawejimus060x.pdfIn PDF document text
    • https://labifunuvi.weebly.com/uploads/1/3/4/8/134847398/ef2f0.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/ohfhgie/airplane_clipart_free_black_and_white.pdfIn PDF document text
    • https://kajuzenutojaso.weebly.com/uploads/1/3/4/6/134631714/75488c.pdfIn PDF document text
    • https://cdn.sqhk.co/javomekoru/jgUgdif/commander_legends_spoilers_date.pdfIn PDF document text
    • http://ostanni.fun/2816955203849e04.pdfIn PDF document text
    • http://nubolats.xyz/13043796593wuaxq.pdfIn PDF document text
    • http://avtoshkola-region26.ru/block_battle_royale_battleground_survival_download8kdki.pdfIn PDF document text
    • http://esclick.pro/is_it_bad_to_have_two_w_on_your_transcriptdxitt.pdfIn PDF document text
    • https://nasovakuj.weebly.com/uploads/1/3/2/3/132303133/8888331.pdfIn PDF document text
    • http://reduslimitalia-official.site/6912814073mq6y9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ff5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5C 4904 bytes
SHA-256: 1909b09ba65a40297fff893578f6478ae52bf07f212413677ea123754bc480e2
font_01_sfnt_off00011023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11023 11156 bytes
SHA-256: e9a8cb9e8d5f3115efaaedfad412006c0c7709c3ba43dc259e7891d25674e575

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