Malicious PDF — malware analysis report

Static analysis result for SHA-256 634abfa5c8dc8634…

MALICIOUS

PDF

85.2 KB Created: 2021-05-10 00:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2e81c2ca276661bd116cbc56a8ab1b8e SHA-1: 15144bda33b138370021dab03ddafcd7be9ba23e SHA-256: 634abfa5c8dc863491ab45227382b6386eb3216092504bb3c54316461fce71df
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and 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 0.9996

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 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://jottigo.ru/strik?utm_term=primus+brake+controller+troubleshooting PDF link annotation
    • http://uscreditreport.info/547076627089gsch.pdfIn PDF document text
    • http://witaxolexigabi.mywebcommunity.org/takemozowuxawidasejanofod.pdfIn PDF document text
    • http://tinesemexogo.mygamesonline.org/alice_in_wonderland_jr_student_book.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/dujikmc7ec.pdfIn PDF document text
    • http://epipog.com/23540349247jwd1m.pdfIn PDF document text
    • http://choosemadam.site/mavutq9nr9.pdfIn PDF document text
    • http://nevinidonet.mywebcommunity.org/call_me_by_your_name_book_vs_movie_reddit.pdfIn PDF document text
    • http://fishing-rods2.club/romiwigovelazeximubawerabem9a.pdfIn PDF document text
    • http://kaboliwup.mypressonline.com/41756754574.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_2e7ddabefc1c49fda64d75f33c780e27.pdf?index=trueIn PDF document text
    • http://nakogis.myartsonline.com/estadistica_descriptiva_gratis.pdfIn PDF document text
    • http://xiniwipilanaju.atwebpages.com/poveranodine.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/fundamentals_of_geotechnical_engineering_5th_edition_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/angular_reactive_forms_valuechanges_formarray.pdfIn PDF document text
    • http://segimoto.myartsonline.com/napoleon_bonaparte_download.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/cash_receipt_template_word.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/htc_m8_cover.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/what_exercise_burns_the_most_calories_in_the_least_amount_of_time.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/95675280084.pdfIn PDF document text
    • https://d5e9a058-cbdc-4968-ba72-30cdbf1e36a3.filesusr.com/ugd/9cfd0a_319b2744478549dba873c1ae75a1f989.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/federal_drug_sentencing_guidelines_chart_2017.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_off0001049d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049D 5420 bytes
SHA-256: 0c0cfb32719b2a2988f6938b31c668b0a93102f8e5c02a32d99f9a9da4a9ca77
font_01_sfnt_off000116d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D5 1936 bytes
SHA-256: cf50d13c5c21d2e34fba0d9dd21119d4839fc35fdaebfe62cbacf51850cc328d
font_02_sfnt_off00012014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12014 10988 bytes
SHA-256: da1eb4afe2221cc096389de53399140ea3c627a14a546edb6b24b04c1fa726ba

Open this report in the interactive analyzer, or submit your own file for analysis.