Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1b16e4e84d746e8…

MALICIOUS

PDF

72.9 KB Created: 2021-06-07 05:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b306b3cc338d9d6e109295ac2af5eac4 SHA-1: ed851b0b6836fe3261dab0ade8413d100f996bc0 SHA-256: d1b16e4e84d746e858e083e701e183a8bb9bdda646c977514e4190b9ac1e4b30
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous embedded URLs, with one prominent URL pointing to 'pixomot.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be related to educational content, a common lure for phishing documents.

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://pixomot.ru/pbw?utm_term=dna+coloring+transcription+and+translation+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418381/normal_602a502705917.pdfIn PDF document text
    • https://pevekalarukug.weebly.com/uploads/1/3/4/3/134318906/pofuvewonitabup_zosoralapuron_zelapat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495402/normal_5fe35a5d618cc.pdfIn PDF document text
    • https://repadugudemi.weebly.com/uploads/1/3/0/9/130969496/nefozu_morov_relafojapexuv_nadizejitono.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sodopateduke.pbworks.com/w/file/fetch/144419790/satesikivilelabusaliru.pdfIn PDF document text
    • http://jujupaw.pbworks.com/f/comprensin_lectora_de_cuarto_grado_de_primaria.pdfIn PDF document text
    • http://paderukut.pbworks.com/f/is_macan_gts_worth_it.pdfIn PDF document text
    • http://dijakezepo.pbworks.com/w/file/fetch/144438249/rewudoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd81300c-f8a8-4aad-8d18-9a2ee3d700fb/jack_reacher_never_go_back_full_movie_stream_free.pdfIn PDF document text
    • http://numefen.pbworks.com/f/ark_artifact_of_the_massive_gfi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7133c15-428a-4175-9a96-5d6b7eb8f5d1/agile_methodology_scrum_framework.pdfIn PDF document text
    • http://gipomebepate.pbworks.com/f/the_gnostic_bible_the_pistis_sophia_unveiled.pdfIn PDF document text
    • http://bojirakaj.pbworks.com/f/42118652880.pdfIn PDF document text
    • http://letonepamusi.pbworks.com/f/25941846861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/609d1ff3-4616-4e2a-9dbf-f9366631857c/24910179362.pdfIn PDF document text
    • http://nefusim.pbworks.com/w/file/fetch/144438807/44399652582.pdfIn PDF document text
    • http://kirozatijawu.pbworks.com/w/file/fetch/144512607/vinayaka_chavithi_pooja_vidhanam_book_telugu.pdfIn PDF document text
    • http://gopidam.pbworks.com/f/limit_edebiyat_tyt_ayt_soru_bankas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09b98a85-1d54-4c1d-90a2-8330402ed9ae/can_godparents_be_confirmation_sponsors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64212f4c-570c-48eb-b193-13a66e98fade/bow_tie_cinemas_royale_6_westport_ave_norwalk_ct.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_off0000dfee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEE 5488 bytes
SHA-256: d7a06b876dc2c40c353266f19a243d75b89e6654df400a259daf4c8a3ab00c65
font_01_sfnt_off0000f2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AC 10136 bytes
SHA-256: 702cf8715b80c1fab0eb9b42e1d38559a4bb03abdb5329249b4b5f5dc0d28d64

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