Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a3005ce933ce7d…

MALICIOUS

PDF

71.6 KB Created: 2021-02-26 07:06:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 58ceee82500b800f8c5f7bf19e6301bf SHA-1: c3b09523d0ca779f91c9376a9a6ba9287e0dbe09 SHA-256: 92a3005ce933ce7d2de2508b5807d55c95fa66993a1a522da2b06434c46ac3fb
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL leading to a diet plan lure. The heuristic PDF_SEO_LINK_FARM indicates a mass of external links, suggesting a link farm or phishing operation. ClamAV and ML classifiers also flagged this as malicious, likely due to the embedded link farm and potential for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=21+days+diet+plan+for+weight+loss PDF link annotation
    • https://sazoxizifa.weebly.com/uploads/1/3/4/5/134505384/pixivukeva.pdfIn PDF document text
    • https://vujilesozigo.weebly.com/uploads/1/3/4/0/134042384/raramexexivozav.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/what_is_system_engineering_process.pdfIn PDF document text
    • https://nukivobiwej.weebly.com/uploads/1/3/4/0/134016752/pavixapam.pdfIn PDF document text
    • http://delinapod.mypressonline.com/steps_on_starting_your_own_business.pdfIn PDF document text
    • https://samaruwopag.weebly.com/uploads/1/3/0/7/130738554/lajunamogiduwoguvav.pdfIn PDF document text
    • https://pudisemibupar.weebly.com/uploads/1/3/4/0/134096773/dd9bbff9.pdfIn PDF document text
    • https://dutajedi.weebly.com/uploads/1/3/5/9/135964159/vipix.pdfIn PDF document text
    • https://jitebogegamoma.weebly.com/uploads/1/3/4/7/134761197/962798.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/lovomijelun/fmea_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/awdhesh_premi_ka_gana_chahiye_video_ing.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/s_corp_bylaws_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/informe_antecedentes_vehiculo_dgt.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/vawitil.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/29598423605.pdfIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/7936528152.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/counting_quarters_dimes_nickels_and_pennies_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/75927881450.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/96396943065.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/adobe_flash_player_fr_android_8._0.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_off0000da4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4A 5588 bytes
SHA-256: 48e06446259236b29ae629c5646cb252174592bd734d274051a9599dae612cf1
font_01_sfnt_off0000ed61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED61 10404 bytes
SHA-256: 9f0896d4592dcbef8ee79a2cfefb19273a57c1cf9112d6dcddefa40386bf21b0

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