Malicious PDF — malware analysis report

Static analysis result for SHA-256 f31786b36689de30…

MALICIOUS

PDF

77.1 KB Created: 2021-05-05 23:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 2cf00189da502b6d67f8f3e237011028 SHA-1: 455f98bfb93f75a448af0ffa961923ca008cfa07 SHA-256: f31786b36689de30855dbdd01de99bdd7b32b545c02a1c64cf8eac9dbb055351
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to manipulate search engine results or direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/strik?utm_term=how+to+fix+a+paslode+battery PDF link annotation
    • https://fagutefoxod.weebly.com/uploads/1/3/4/2/134235025/jodajukadolevuxes.pdfIn PDF document text
    • http://wupunekum.getenjoyment.net/caissons_go_rolling_along.pdfIn PDF document text
    • https://rurevudo.weebly.com/uploads/1/3/4/2/134265418/b7d5a9799.pdfIn PDF document text
    • http://mogimetekojubar.scienceontheweb.net/70054628567.pdfIn PDF document text
    • http://nituzovido.getenjoyment.net/86963844858.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/99440485038.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/metodo_de_guitarra_clasica.pdfIn PDF document text
    • http://xawamiwupajev.mygamesonline.org/23314193664.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/wavunot/aur_pyar_ho_gaya_movie_480p.pdfIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_cacbfc9398a841128ed620d943593d48.pdf?index=trueIn PDF document text
    • https://a4067306-84c0-45ce-9c36-3cbb795fcb37.filesusr.com/ugd/d5b970_e9dfe8a803ec454fa9e255174912e82c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/patotale/weber_smokey_mountain_cooker_18_inch_smoker.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/25113243761.pdfIn PDF document text
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_de9ca2041ced4794bc5c52a58550bde5.pdf?index=trueIn PDF document text
    • http://fetekovabu.onlinewebshop.net/deductive_and_inductive_method_of_research.pdfIn PDF document text
    • https://da9d63b4-fbfd-4f6f-88e7-06ac0d76355b.filesusr.com/ugd/ca300b_239a43403d824173b4f3a3d58eadc126.pdf?index=trueIn PDF document text
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_3b90d97af81145348928b20cad3f2746.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jinabisura/madogowofikajeto.pdfIn PDF document text
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_fd7cd38918ed494d9b949ae88db38490.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/aplicacion_para_ver_tv_android_gratis_2019.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/tumor_basocelular.pdfIn PDF document text
    • https://e20d271a-53e3-41f9-9180-d6cd5f9fd148.filesusr.com/ugd/6cfc61_724708400c4d4b1a990cf1ff363787c4.pdf?index=trueIn 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_off0000eeac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAC 5396 bytes
SHA-256: 8383d2eace96eca5f8fc183659a30d59fddffb38204ccba75c32824d00d450a4
font_01_sfnt_off00010125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10125 10924 bytes
SHA-256: a33737087ac2dedd68beb36f40c126d4b77548014c3714da441b7fd8d23a52f8

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