Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0d79b5a90b8b10…

MALICIOUS

PDF

90.4 KB Created: 2021-03-25 15:27:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f313cd1bd06ef1730238ccb70214766c SHA-1: b34d686ca2778fe0d350c4cee017fdd2cc377f41 SHA-256: 9d0d79b5a90b8b104d884a570cead4bace4731a26912f3ce7b86a18fb2fe1cf4
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9991

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://xajibur.ru/award?keyword=caracteristicas+de+los+camelidos+sudamericanos+pdf PDF link annotation
    • http://kamikofonem.mygamesonline.org/how_old_are_the_characters_in_dork_diaries.pdfIn PDF document text
    • http://topcreditscore.info/66266187562ltdsu.pdfIn PDF document text
    • http://zurafumodajirof.iblogger.org/fexabonuduve.pdfIn PDF document text
    • http://videohost.space/39332154558tbnyz.pdfIn PDF document text
    • http://jefijunanupe.sportsontheweb.net/videocon_bazoomba_tv_circuit_diagram.pdfIn PDF document text
    • http://tokepubex.getenjoyment.net/gugomomulojusikokif.pdfIn PDF document text
    • http://ru-payment.casa/pisumizonumid26d8.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/12998821494.pdfIn PDF document text
    • http://rusakadovub.sportsontheweb.net/6482467384.pdfIn PDF document text
    • http://xsale.trade/what_is_a_gas_burner0iuuh.pdfIn PDF document text
    • http://goligofalu.medianewsonline.com/woguge.pdfIn PDF document text
    • http://zitirisiz.mywebcommunity.org/achyutam_keshavam_rama_narayanam_lyrics.pdfIn PDF document text
    • http://reduslim-shopofficial.site/xamexadalifinovuxupakepotuvt02.pdfIn PDF document text
    • http://mists.space/rodomunakrkzeg.pdfIn PDF document text
    • http://zuxekagapefe.mygamesonline.org/singular_and_plural_possessive_nouns_worksheet_3rd_grade.pdfIn PDF document text
    • http://nakanilo.club/intrauterine_transfusion_guidelines_aabbm5ez2.pdfIn PDF document text
    • http://iceteas.space/mapa_cognitivo_de_escalonesqu7xw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://laxuzoto.onlinewebshop.net/comparative_law_of_international_arbitration.pdfIn PDF document text
    • http://fubusomarixemuw.rf.gd/constructive_approximation_advanced_problems.pdfIn PDF document text
    • http://nopawalaxuwaw.onlinewebshop.net/emerson_led_tv_remote_codes.pdfIn PDF document text
    • http://desovizipelo.onlinewebshop.net/buku_panduan_akreditasi_puskesmas.pdfIn PDF document text
    • http://nomulumipal.rf.gd/mafubitizanozefaf.pdfIn PDF document text
    • http://miwufojo.epizy.com/36343973346.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB2 5208 bytes
SHA-256: 5b8adfdfb186d175db6c92934dcc7fca7f062a8e4752b733907c50de08ef2224
font_01_sfnt_off00011c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4C 12208 bytes
SHA-256: afbd7ac3769e465ee764df6b3a0bc974d9753a0e441ab562dd2ca400a9ad97e1
font_02_sfnt_off00014435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14435 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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