Malicious PDF — malware analysis report

Static analysis result for SHA-256 491caa7603f1d3d8…

MALICIOUS

PDF

79.9 KB Created: 2021-02-06 14:12:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 8eb38cd82a1fd2552033f07e00c75567 SHA-1: a00a644960ee5c6c2c1370a0e0202fd073349078 SHA-256: 491caa7603f1d3d80404d13fbdcc9f820129ad4331c727618a2d6b86d790fa4d
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://leonvi.ru/aws?utm_term=arduino+smart+car+project+report PDF link annotation
    • http://muziwavesos.iblogger.org/calcium_metabolism_in_dentistry.pdfIn PDF document text
    • http://gatorama.fun/rotusazyxjxi.pdfIn PDF document text
    • https://tupivoxutod.weebly.com/uploads/1/3/4/4/134467409/gekopajuro_ladojujubanu_melifiwivago.pdfIn PDF document text
    • https://lareduna.weebly.com/uploads/1/3/1/4/131453109/tisinop.pdfIn PDF document text
    • https://newosupileseru.weebly.com/uploads/1/3/2/3/132303396/xawuner-fikelete.pdfIn PDF document text
    • http://gbarb.me/warren_buffett_gold_quote0njsm.pdfIn PDF document text
    • https://dexatasudawuge.weebly.com/uploads/1/3/4/4/134477966/4289871.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380393/normal_5ffa55b91636c.pdfIn PDF document text
    • http://pepujolajerikur.66ghz.com/frog_dissection_diagram_labeled_worksheet.pdfIn PDF document text
    • https://dolepaxutafajur.weebly.com/uploads/1/3/0/9/130969408/3709124.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404107/normal_600648326e186.pdfIn PDF document text
    • http://bigakeka.iblogger.org/experience_resume_templates_word.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luxovas.rf.gd/56781243275.pdfIn PDF document text
    • http://nejetetivapane.epizy.com/ziluxamazajafosutaxemev.pdfIn PDF document text
    • http://bonogeliraxi.rf.gd/12794110670.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_off0000ef0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0C 5252 bytes
SHA-256: 16454475b30651bed905aa909e4e1f39759b155f9d652a3d71ec64107774f91f
font_01_sfnt_off000100d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D4 15664 bytes
SHA-256: 78e7cff2c871226eab69f885a73fba854c8b79eece17b0c5c9571f23f4552dcf