Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f56758cc6c4d0d…

MALICIOUS

PDF

81.3 KB Created: 2021-05-14 20:15:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f3d03c062d32da4283d87fd243022771 SHA-1: 28c3171f5d19327f7059af887c406b12aaf785dc SHA-256: f9f56758cc6c4d0df1eea8c012c01fc5db7488bc814701bcbb8dddf1077f380f
156 Risk Score

Malware Insights

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

The file is a PDF that contains a large number of external links, many of which point to potentially malicious domains. The ML classifier and ClamAV both flagged this file as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/strik?utm_term=boss+ve-2+vocal+harmonist+manual PDF link annotation
    • https://cdn.sqhk.co/bipokagiti/ihaWNQT/fulupowobozubolutoxej.pdfIn PDF document text
    • https://xogevowizixid.weebly.com/uploads/1/3/0/9/130969953/2014882.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/hchNg1I/last_minute_luxury_hotels_nyc.pdfIn PDF document text
    • https://gewaxuselez.weebly.com/uploads/1/3/4/2/134265722/wasulif.pdfIn PDF document text
    • https://lujigoget.weebly.com/uploads/1/3/4/4/134482608/f21023016d9.pdfIn PDF document text
    • https://feboratopaw.weebly.com/uploads/1/3/1/3/131383734/4270314.pdfIn PDF document text
    • https://cdn.sqhk.co/suxidixip/9jcp0gj/pupusubedojokodek.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/3GLviip/download_music_mp3_files_free_skull.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/61c40074-a7c1-4fe5-9ded-98206db2e86f/the_metamorphosis_franz_kafka_explained.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/14748524627.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02a41835-140b-479a-9d55-468016766d0e/maths_all_formulas_class_11.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/taiwan_mrt_map.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/building_bye_laws_bangalore_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c445998-9b1c-4cd7-a1ce-69abc2b2b0a4/73024383010.pdfIn PDF document text
    • https://9a4203bb-6ff2-4ef1-9c63-3f113f84a884.filesusr.com/ugd/ea9bdf_de255446fd714aee8f8d7a2d4ff4e1f8.pdf?index=trueIn PDF document text
    • https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_9bea68ca56f24019897e6df38875ab4d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/216591e7-6662-4650-a2fb-f0b5029a6804/the_difference_between_hard_news_and_soft_news.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/vma_music_awards_2019_performances.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/dutovomavomizubiku.pdfIn PDF document text
    • https://7292b199-6d7c-4e84-b646-7854114497ba.filesusr.com/ugd/53361e_1440fbdfba384e3f8b40882e94dd2f97.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/feropupovofitamojexepix.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/follow_up_email_to_prospective_client_template.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/borinoxemevimakesonagekad.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/75263569405.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_off0000f467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF467 5312 bytes
SHA-256: e92b9495cadb392d670245427ae4e199c74bfee46ddb74221e900009565056ec
font_01_sfnt_off0001065c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065C 19712 bytes
SHA-256: 627cf62453e3267a12ccd78bfb8575291f93f08953d3f2caa50ab917bf982d86

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