Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fb816ea8782bd75…

MALICIOUS

PDF

72.4 KB Created: 2021-02-02 02:20:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 57fc2f6261780a2e51ef889ac4c67ee8 SHA-1: e3ea10ddcc36c6be9ad1879999087253847e23c7 SHA-256: 3fb816ea8782bd75bc95e8f9f0e3446e98622a3e776b955a2f10d29de549d782
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/aws?utm_term=esl+worksheets+jobs+vocabulary PDF link annotation
    • http://stnold.com/44277912035xeai6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391649/normal_6008ab39598ec.pdfIn PDF document text
    • http://islandlandscapesbb.com/inpixio_photo_maximizer_pro_free_downloadohk83.pdfIn PDF document text
    • https://gojudewusidaza.weebly.com/uploads/1/3/4/8/134888042/19d8fd59ae.pdfIn PDF document text
    • http://hookup153.online/furofakozifitojosdvyc.pdfIn PDF document text
    • http://copyright-supporthelp.com/callapp_premium_cracked_apkhbnfk.pdfIn PDF document text
    • http://smartbright.club/zamovupegenupiwoxanodtsrj.pdfIn PDF document text
    • http://xuvivok.22web.org/3-_circle_venn_diagram_template_in_ppt.pdfIn PDF document text
    • https://jufigewadekuxo.weebly.com/uploads/1/3/1/4/131406441/gojajopozepu.pdfIn PDF document text
    • https://kagodititaf.weebly.com/uploads/1/3/4/8/134868324/negizipanonig-zoxetutilij-zuzeloxojaxa.pdfIn PDF document text
    • https://nobexuliga.weebly.com/uploads/1/3/1/4/131405940/nixipopigevavusu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426261/normal_5ff684952b17d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mafevela.rf.gd/medipupuxujadu.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/bts_love_yourself_answer_full_album_audio.pdfIn PDF document text
    • http://dorowoz.rf.gd/broken_cuneiform_bone_healing_time.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_off0000ddb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB5 5380 bytes
SHA-256: 78cf01d1f11986c8b84fc5115e7ef57d0a25f6f18e3300eeb6984cdfc0a90b7e
font_01_sfnt_off0000f01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01D 11004 bytes
SHA-256: 515d17a804bb6664cabde555db0549eba7c5667bc8be0304ef4c14ca71bcd74c