Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e91c02cfd1e0e9e…

MALICIOUS

PDF

74.0 KB Created: 2021-03-20 21:18:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8750d0b1e7638cad1568cf36e11f4df2 SHA-1: 8657ea6d4a54a8a94dc36562814adb2fcdb23228 SHA-256: 2e91c02cfd1e0e9e51f0005817168b117968974d3655b6f8b4a5b4b7118db8fd
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, appears to be a lure related to an instruction manual, suggesting a phishing or malware distribution attempt. The presence of multiple external URIs and the link farm heuristic indicate a high likelihood of redirecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 4

  • 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://resalured.ru/wix?keyword=cst+berger+lm30+instruction+manual PDF link annotation
    • http://ing-cliente.com/vajidoluduk6o3if.pdfIn PDF document text
    • http://glawerry.online/escape_the_room_4_level_24bv55o.pdfIn PDF document text
    • http://voirlo.xyz/jobananexg944d.pdfIn PDF document text
    • http://xbet1.fun/bafevtvtvi.pdfIn PDF document text
    • http://simultaneously.space/31054473895krkj9.pdfIn PDF document text
    • http://apparentlyopt.com/one_call_away_lyrics_and_chordsd0aor.pdfIn PDF document text
    • http://akillidestekbasvuruformu.online/game_online_hay_cho_androiddr3fq.pdfIn PDF document text
    • http://drenajkrasnodar.ru/exercicios_tabela_de_frequencia_estatistica_docwryn1.pdfIn PDF document text
    • http://pl50off.info/what_kind_of_oil_does_a_2012_chevy_impala_ltz_take2axmj.pdfIn PDF document text
    • http://kmikaerfs.ru/how_to_fix_a_gas_stove_oven_that_wont_light3r78e.pdfIn PDF document text
    • http://czecheducation.space/tracteur_david_brown_990_selectamaticq6fn.pdfIn PDF document text
    • http://grizhoff.ru/60338001787paeoq.pdfIn PDF document text
    • http://midadef.iblogger.org/roll_over_to_zoom_troy-bilt_gasoline_edger_25a-516-766.pdfIn PDF document text
    • http://usesalle.xyz/23703584593qxfe4.pdfIn PDF document text
    • http://apparentlyopt.com/80775061096ilx7u.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/lorugipopuxe/dragostea_din_tei_sheet_music.pdfIn PDF document text
    • https://05790d5e-93e9-4545-bcc4-99c37f081c18.filesusr.com/ugd/bff4d5_fb6f5c47422d4cf68d6fc180cc86ddc0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luxelula/types_of_organizational_structures_writing.pdfIn PDF document text
    • https://0aed7b51-d02b-4864-a6bb-b478bb809667.filesusr.com/ugd/fbdaab_7169d4c90d804cd5aa13e51bcd0d96dd.pdf?index=trueIn PDF document text
    • https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_ece14b04d53e4f27a2df6790d37bb25a.pdf?index=trueIn PDF document text
    • http://fokodema.epizy.com/docker_kubernetes_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/dyson_ball_animal_vacuum_for_soft_carpet.pdfIn PDF document text
    • https://7ef7ebf0-bcb0-4ca2-8538-5a19c3e9f01c.filesusr.com/ugd/aff7ca_84f6df7457b240d188ef7de7b78a7b3a.pdf?index=trueIn PDF document text
    • http://vudubozudavoso.rf.gd/prentice_hall_mathematics_algebra_1_workbook_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/counter_strike_1._6_offline_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/what_does_size_12b_mean.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_off0000dfe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE8 5468 bytes
SHA-256: 4aa8c94a7ec42bffcc6c3e2882595e74198b21b4a8143ceeb1143b7b1f2b2764
font_01_sfnt_off0000f261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF261 11016 bytes
SHA-256: 6a8c821e53eedc20eb2bfb8175a02a55825954f2601238946a3c09c0b6ac50ec

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