Malicious PDF — malware analysis report

Static analysis result for SHA-256 0714eb3f4fb4992e…

MALICIOUS

PDF

74.3 KB Created: 2021-03-13 17:17:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a4a22251caad52567cb46052c2f0e583 SHA-1: 9d1c53c0553aac723e5bba41f6067bb37c039e1f SHA-256: 0714eb3f4fb4992eba4eaab0b4159a7857caa9fcbf8190116079158493df8b7d
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 0.9993

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://zajinet.ru/strik?utm_term=mounting+sunsetter+awnings PDF link annotation
    • http://insta-sale.site/maxiscan_ms300_says_link_error9vxkn.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/2010_camaro_ss_for_sale_los_angeles.pdfIn PDF document text
    • https://puziwifatewir.weebly.com/uploads/1/3/4/7/134715637/demabolaxi.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/hiaChaz/13763050456.pdfIn PDF document text
    • http://myimperfectmomlife.com/roomba_770_battery_resetc9wwx.pdfIn PDF document text
    • http://damewumesigalut.medianewsonline.com/57585463874.pdfIn PDF document text
    • http://zabavnyi-slon.ru/how_to_replace_samsung_tv_remote_controls7tza.pdfIn PDF document text
    • http://tebafurunaxinuj.getenjoyment.net/51956776672.pdfIn PDF document text
    • https://lozofuxoxezutuw.weebly.com/uploads/1/3/5/3/135303337/ravipesewufame_xalenupi.pdfIn PDF document text
    • https://regogugone.weebly.com/uploads/1/3/4/8/134891767/2864443.pdfIn PDF document text
    • https://cdn.sqhk.co/folamudoj/ku0z4jj/german_airplanes_world_war_2.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/fuwawibu/append_file_to_formdata_javascript.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/sidezadutegewasakojonup.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/hiwassee_river_trout_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/wedding_vow_template_funny.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/badupezeboruri.pdfIn PDF document text
    • http://besafetusupug.atwebpages.com/patojagimabulusodisa.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/hallelujah_handel_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/xogakatomovepesasojubar.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/nilajebowivuzes.pdfIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/bijuluvi.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/pepitijajekelenuwozajika.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/palo_alto_vm_series.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_off0000e4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A4 4916 bytes
SHA-256: 2e29206e691c2a0e77cd57d7b5576803c846b754ced3bcda7fa176912ba709ab
font_01_sfnt_off0000f58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58C 10760 bytes
SHA-256: e360e9e49a4d21e9d7ba58ac3e01f7ebac0d906f6b8a2af1ef9486a5bc85baaf

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