Malicious PDF — malware analysis report

Static analysis result for SHA-256 16b45d11d2da7b3e…

MALICIOUS

PDF

79.2 KB Created: 2021-03-01 09:06:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 4d4ccc5ce092611088ff25b248655dd5 SHA-1: 05964610e5f1a7d9c1d213904d222f0ed900afeb SHA-256: 16b45d11d2da7b3eff0b7420e6f94afaab7267ddfa88fa1eb02a12d2410a6b83
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains or potentially malicious content, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to search queries, suggesting a lure to trick users into visiting these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://bologen.ru/award?keyword=what+order+should+i+watch+the+lord+of+the+rings PDF link annotation
    • http://chebsvet.ru/brother_mfc-7340_drum_erroruxv93.pdfIn PDF document text
    • https://cdn.sqhk.co/rufosopufu/jcwjhht/tangled_2_full_movie.pdfIn PDF document text
    • http://naturfresh.fun/literature_quiz_and_answersqzce9.pdfIn PDF document text
    • http://mumijivamivaxij.medianewsonline.com/romeo_and_juliet_questions_and_answers_quizlet.pdfIn PDF document text
    • https://cdn.sqhk.co/vikoparif/BbIigdQ/the_archers_2_apk_home.pdfIn PDF document text
    • http://tb-films.ru/tax_receipt_template_nzg1syb.pdfIn PDF document text
    • http://sedouche.xyz/ribedorelafolugjxfg.pdfIn PDF document text
    • https://cdn.sqhk.co/pozusonitid/icq50if/application_insights_for_android.pdfIn PDF document text
    • http://vumajufeboxidik.mywebcommunity.org/96007957809.pdfIn PDF document text
    • http://kreativoblako.com/importance_of_government_of_india_act_1935_in_hindihk49t.pdfIn PDF document text
    • http://7lessons.space/snipers_vs_thieves_classicwswzx.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/6Mdtptz/what_can_i_buy_on_ebay_to_resell.pdfIn PDF document text
    • http://abouts.space/iata_airlines_codes_listv5jow.pdfIn PDF document text
    • http://tehnotop.space/software_tester_resume_canadarsws2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://laxolivavaru.epizy.com/easy_recipe_for_lasagna_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/miwaru.pdfIn PDF document text
    • http://zizematav.epizy.com/bufuzarexajame.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/plate_tectonics_continental_drift_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/wofuzebigipejiluzafesev.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/kenneth_e_hagin_healing_belongs_to_us.pdfIn PDF document text
    • http://zaxenedapepobu.rf.gd/fubunusikufinilutewu.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/96624142036.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ead6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD6 5268 bytes
SHA-256: eecbc31e3b2402cc07dfe75a9f9e377dbbb85d908267a7d404907ebc83a06dee
font_01_sfnt_off0000fcd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD2 10428 bytes
SHA-256: a074f13cdfe0b0ff9feb871c262fd428de2d53b59914bf2b35cd6232596a0a9a
font_02_sfnt_off00012081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12081 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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